diff --git a/infer/src/IR/AttributesTable.re b/infer/src/IR/AttributesTable.re
index 290aa9648..e47f746b4 100644
--- a/infer/src/IR/AttributesTable.re
+++ b/infer/src/IR/AttributesTable.re
@@ -5,6 +5,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/AttributesTable.rei b/infer/src/IR/AttributesTable.rei
index fe4c5aae3..3c0711ba5 100644
--- a/infer/src/IR/AttributesTable.rei
+++ b/infer/src/IR/AttributesTable.rei
@@ -5,6 +5,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Cfg.re b/infer/src/IR/Cfg.re
index cde767e73..546d3fb9c 100644
--- a/infer/src/IR/Cfg.re
+++ b/infer/src/IR/Cfg.re
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Cfg.rei b/infer/src/IR/Cfg.rei
index b73ff3bbe..4c2138847 100644
--- a/infer/src/IR/Cfg.rei
+++ b/infer/src/IR/Cfg.rei
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Cg.re b/infer/src/IR/Cg.re
index d08239c5b..bc9b5b93c 100644
--- a/infer/src/IR/Cg.re
+++ b/infer/src/IR/Cg.re
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Cg.rei b/infer/src/IR/Cg.rei
index 1fbb19349..79bd5b650 100644
--- a/infer/src/IR/Cg.rei
+++ b/infer/src/IR/Cg.rei
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Csu.re b/infer/src/IR/Csu.re
index 2983bbdf9..2b3ac9c4b 100644
--- a/infer/src/IR/Csu.re
+++ b/infer/src/IR/Csu.re
@@ -5,6 +5,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Csu.rei b/infer/src/IR/Csu.rei
index 433f2c46f..1d3d8b00a 100644
--- a/infer/src/IR/Csu.rei
+++ b/infer/src/IR/Csu.rei
@@ -5,6 +5,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Ident.re b/infer/src/IR/Ident.re
index cc92ce04c..c9599c161 100644
--- a/infer/src/IR/Ident.re
+++ b/infer/src/IR/Ident.re
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
@@ -412,4 +414,4 @@ let pp_name_list = pp_comma_seq pp_name;
  let make_ident_primed id =
    if id.kind == kprimed then assert false
    else { id with kind = kprimed }
- */
\ No newline at end of file
+ */
diff --git a/infer/src/IR/Ident.rei b/infer/src/IR/Ident.rei
index f6953b6fd..855f950a9 100644
--- a/infer/src/IR/Ident.rei
+++ b/infer/src/IR/Ident.rei
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Location.re b/infer/src/IR/Location.re
index 7b54e07a6..a855030fc 100644
--- a/infer/src/IR/Location.re
+++ b/infer/src/IR/Location.re
@@ -5,6 +5,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Location.rei b/infer/src/IR/Location.rei
index d97e65e9f..fe8c59667 100644
--- a/infer/src/IR/Location.rei
+++ b/infer/src/IR/Location.rei
@@ -5,6 +5,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Mangled.re b/infer/src/IR/Mangled.re
index 70ec9755e..cf197a18c 100644
--- a/infer/src/IR/Mangled.re
+++ b/infer/src/IR/Mangled.re
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Mangled.rei b/infer/src/IR/Mangled.rei
index 023306b9e..ad644b353 100644
--- a/infer/src/IR/Mangled.rei
+++ b/infer/src/IR/Mangled.rei
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/ProcAttributes.re b/infer/src/IR/ProcAttributes.re
index c31ae23eb..62022c7d0 100644
--- a/infer/src/IR/ProcAttributes.re
+++ b/infer/src/IR/ProcAttributes.re
@@ -5,6 +5,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/ProcAttributes.rei b/infer/src/IR/ProcAttributes.rei
index 6df4d92b0..c26e65aa1 100644
--- a/infer/src/IR/ProcAttributes.rei
+++ b/infer/src/IR/ProcAttributes.rei
@@ -5,6 +5,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Procname.re b/infer/src/IR/Procname.re
index b14b15a8b..abcc764b7 100644
--- a/infer/src/IR/Procname.re
+++ b/infer/src/IR/Procname.re
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Procname.rei b/infer/src/IR/Procname.rei
index 5a1d716a0..930c5c0ce 100644
--- a/infer/src/IR/Procname.rei
+++ b/infer/src/IR/Procname.rei
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Pvar.re b/infer/src/IR/Pvar.re
index 64fe8962a..140973392 100644
--- a/infer/src/IR/Pvar.re
+++ b/infer/src/IR/Pvar.re
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Pvar.rei b/infer/src/IR/Pvar.rei
index 326bd05b7..d6470a1be 100644
--- a/infer/src/IR/Pvar.rei
+++ b/infer/src/IR/Pvar.rei
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Sil.re b/infer/src/IR/Sil.re
index 4e2377eb4..a6fe33a3f 100644
--- a/infer/src/IR/Sil.re
+++ b/infer/src/IR/Sil.re
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Sil.rei b/infer/src/IR/Sil.rei
index 898fcbcc2..19a02553a 100644
--- a/infer/src/IR/Sil.rei
+++ b/infer/src/IR/Sil.rei
@@ -6,6 +6,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Tenv.re b/infer/src/IR/Tenv.re
index baf189dd8..a7d91f376 100644
--- a/infer/src/IR/Tenv.re
+++ b/infer/src/IR/Tenv.re
@@ -5,6 +5,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Tenv.rei b/infer/src/IR/Tenv.rei
index d55b23231..40c7afe62 100644
--- a/infer/src/IR/Tenv.rei
+++ b/infer/src/IR/Tenv.rei
@@ -5,6 +5,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Typename.re b/infer/src/IR/Typename.re
index 05f7415ad..e3fa4473c 100644
--- a/infer/src/IR/Typename.re
+++ b/infer/src/IR/Typename.re
@@ -5,6 +5,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;
diff --git a/infer/src/IR/Typename.rei b/infer/src/IR/Typename.rei
index 182d21aa1..5bd9dd690 100644
--- a/infer/src/IR/Typename.rei
+++ b/infer/src/IR/Typename.rei
@@ -5,6 +5,8 @@
  * This source code is licensed under the BSD style license found in the
  * LICENSE file in the root directory of this source tree. An additional grant
  * of patent rights can be found in the PATENTS file in the same directory.
+ * vim: set ft=rust:
+ * vim: set ft=reason:
  */
 
 open! Utils;