diff --git a/infer/src/concurrency/ConcurrencyModels.mli b/infer/src/concurrency/ConcurrencyModels.mli
index 2e8286fab..a3a130695 100644
--- a/infer/src/concurrency/ConcurrencyModels.mli
+++ b/infer/src/concurrency/ConcurrencyModels.mli
@@ -6,7 +6,6 @@
  *)
 
 open! IStd
-module F = Format
 
 (** effect of call plus Hil expressions being un/locked, if known *)
 type lock_effect =
diff --git a/infer/src/concurrency/StarvationModels.ml b/infer/src/concurrency/StarvationModels.ml
index e4083d63f..5b3aac204 100644
--- a/infer/src/concurrency/StarvationModels.ml
+++ b/infer/src/concurrency/StarvationModels.ml
@@ -6,6 +6,7 @@
  *)
 
 open! IStd
+module F = Format
 
 let is_synchronized_library_call =
   let targets = ["java.lang.StringBuffer"; "java.util.Hashtable"; "java.util.Vector"] in
@@ -89,9 +90,15 @@ let empty_or_excessive_timeout actuals =
       false
 
 
+type severity = Low | Medium | High [@@deriving compare]
+
+let pp_severity fmt sev =
+  let msg = match sev with Low -> "Low" | Medium -> "Medium" | High -> "High" in
+  F.pp_print_string fmt msg
+
+
 let standard_matchers =
   let open MethodMatcher in
-  let open StarvationDomain.Event in
   let high_sev =
     [ {default with classname= "java.lang.Thread"; methods= ["sleep"]}
     ; { default with
diff --git a/infer/src/concurrency/StarvationModels.mli b/infer/src/concurrency/StarvationModels.mli
index f9d39fed1..2637e6a32 100644
--- a/infer/src/concurrency/StarvationModels.mli
+++ b/infer/src/concurrency/StarvationModels.mli
@@ -6,9 +6,13 @@
  *)
 
 open! IStd
+module F = Format
 
-val may_block :
-  Tenv.t -> Typ.Procname.t -> HilExp.t list -> StarvationDomain.Event.severity_t option
+type severity = Low | Medium | High [@@deriving compare]
+
+val pp_severity : F.formatter -> severity -> unit
+
+val may_block : Tenv.t -> Typ.Procname.t -> HilExp.t list -> severity option
 (** is the method call potentially blocking, given the actuals passed? *)
 
 val is_strict_mode_violation : Tenv.t -> Typ.Procname.t -> HilExp.t list -> bool
diff --git a/infer/src/concurrency/starvation.ml b/infer/src/concurrency/starvation.ml
index 20e96c9f5..6d8737912 100644
--- a/infer/src/concurrency/starvation.ml
+++ b/infer/src/concurrency/starvation.ml
@@ -183,7 +183,7 @@ module ReportMap : sig
 
   val add_deadlock : report_add_t
 
-  val add_starvation : StarvationDomain.Event.severity_t -> report_add_t
+  val add_starvation : StarvationModels.severity -> report_add_t
 
   val add_strict_mode_violation : report_add_t
 
@@ -192,7 +192,7 @@ module ReportMap : sig
   val log : IssueLog.t -> Tenv.t -> Procdesc.t -> t -> IssueLog.t
 end = struct
   type problem =
-    | Starvation of StarvationDomain.Event.severity_t
+    | Starvation of StarvationModels.severity
     | Deadlock of int
     | StrictModeViolation of int
     | LocklessViolation of int
@@ -298,7 +298,7 @@ end = struct
       let lockless_violations = List.filter_map problems ~f:filter_map_lockless_violation in
       log_reports (compare_reports Int.compare) loc deadlocks issue_log
       |> log_reports (compare_reports Int.compare) loc lockless_violations
-      |> log_reports (compare_reports StarvationDomain.Event.compare_severity_t) loc starvations
+      |> log_reports (compare_reports StarvationModels.compare_severity) loc starvations
       |> log_reports (compare_reports Int.compare) loc strict_mode_violations
     in
     LocMap.fold log_location map start_issue_log
diff --git a/infer/src/concurrency/starvationDomain.ml b/infer/src/concurrency/starvationDomain.ml
index 78b6e3088..b4400c944 100644
--- a/infer/src/concurrency/starvationDomain.ml
+++ b/infer/src/concurrency/starvationDomain.ml
@@ -48,21 +48,17 @@ module Lock = struct
 end
 
 module Event = struct
-  type severity_t = Low | Medium | High [@@deriving compare]
-
-  let pp_severity fmt sev =
-    let msg = match sev with Low -> "Low" | Medium -> "Medium" | High -> "High" in
-    F.pp_print_string fmt msg
-
-
-  type t = LockAcquire of Lock.t | MayBlock of (string * severity_t) | StrictModeCall of string
+  type t =
+    | LockAcquire of Lock.t
+    | MayBlock of (string * StarvationModels.severity)
+    | StrictModeCall of string
   [@@deriving compare]
 
   let pp fmt = function
     | LockAcquire lock ->
         F.fprintf fmt "LockAcquire(%a)" Lock.pp lock
     | MayBlock (msg, sev) ->
-        F.fprintf fmt "MayBlock(%s, %a)" msg pp_severity sev
+        F.fprintf fmt "MayBlock(%s, %a)" msg StarvationModels.pp_severity sev
     | StrictModeCall msg ->
         F.fprintf fmt "StrictModeCall(%s)" msg
 
diff --git a/infer/src/concurrency/starvationDomain.mli b/infer/src/concurrency/starvationDomain.mli
index a92da4a49..4203dd06d 100644
--- a/infer/src/concurrency/starvationDomain.mli
+++ b/infer/src/concurrency/starvationDomain.mli
@@ -22,9 +22,10 @@ module Lock : sig
 end
 
 module Event : sig
-  type severity_t = Low | Medium | High [@@deriving compare]
-
-  type t = LockAcquire of Lock.t | MayBlock of (string * severity_t) | StrictModeCall of string
+  type t =
+    | LockAcquire of Lock.t
+    | MayBlock of (string * StarvationModels.severity)
+    | StrictModeCall of string
   [@@deriving compare]
 
   val describe : F.formatter -> t -> unit
@@ -96,7 +97,7 @@ val acquire : Tenv.t -> t -> procname:Typ.Procname.t -> loc:Location.t -> Lock.t
 val release : t -> Lock.t list -> t
 (** simultaneously release a number of locks, no-op if list is empty *)
 
-val blocking_call : callee:Typ.Procname.t -> Event.severity_t -> loc:Location.t -> t -> t
+val blocking_call : callee:Typ.Procname.t -> StarvationModels.severity -> loc:Location.t -> t -> t
 
 val strict_mode_call : callee:Typ.Procname.t -> loc:Location.t -> t -> t