diff --git a/infer/src/IR/Procname.ml b/infer/src/IR/Procname.ml
index d5f4d7e42..280d0b77d 100644
--- a/infer/src/IR/Procname.ml
+++ b/infer/src/IR/Procname.ml
@@ -781,7 +781,7 @@ let to_filename pname =
     | _ ->
         F.asprintf "%a" pp_unique_id pname
   in
-  Escape.escape_filename @@ DB.append_crc_cutoff proc_id
+  DB.append_crc_cutoff proc_id
 
 
 module SQLite = struct
diff --git a/infer/src/istd/Escape.ml b/infer/src/istd/Escape.ml
index 29b2bfa69..19e7b5e8f 100644
--- a/infer/src/istd/Escape.ml
+++ b/infer/src/istd/Escape.ml
@@ -100,18 +100,6 @@ let escape_path s =
   escape_map map s
 
 
-(* Python 2 sucks at utf8 so do not write unicode file names to disk
-   as Python may need to see them *)
-let escape_filename s =
-  let map = function
-    | c when Char.to_int c > 127 ->
-        Some "?" (* non-ascii character: escape *)
-    | _ ->
-        None
-  in
-  escape_map map s
-
-
 let escape_json s = escape_map (function '"' -> Some "\\\"" | '\\' -> Some "\\\\" | _ -> None) s
 
 let escape_double_quotes s = escape_map (function '"' -> Some "\\\"" | _ -> None) s
diff --git a/infer/src/istd/Escape.mli b/infer/src/istd/Escape.mli
index f1bccfa0b..458162a1b 100644
--- a/infer/src/istd/Escape.mli
+++ b/infer/src/istd/Escape.mli
@@ -20,9 +20,6 @@ val escape_xml : string -> string
 
 val escape_url : string -> string
 
-val escape_filename : string -> string
-(** escape a string to be used as a file name *)
-
 val escape_json : string -> string
 (** escape characters in the string so it becomes a valid JSON string *)