diff --git a/compiler/lib/eval.ml b/compiler/lib/eval.ml
index 75d655bbb..6ecb48fae 100644
--- a/compiler/lib/eval.ml
+++ b/compiler/lib/eval.ml
@@ -272,6 +272,10 @@ let constant_js_equal a b =
   | _, Float_array _
   | Int64 _, _
   | _, Int64 _
+  | Int32 _, _
+  | _, Int32 _
+  | NativeInt _, _
+  | _, NativeInt _
   | Tuple _, _
   | _, Tuple _ -> None
 
diff --git a/compiler/lib/flow.ml b/compiler/lib/flow.ml
index 1212e56f0..95aa383a2 100644
--- a/compiler/lib/flow.ml
+++ b/compiler/lib/flow.ml
@@ -341,6 +341,10 @@ let constant_identical a b =
   | _, Float_array _
   | Int64 _, _
   | _, Int64 _
+  | Int32 _, _
+  | _, Int32 _
+  | NativeInt _, _
+  | _, NativeInt _
   | Tuple _, _
   | _, Tuple _ -> false