diff --git a/src/FSharp.Core/prim-types.fsi b/src/FSharp.Core/prim-types.fsi
index dee677aac31..89b8ec82b38 100644
--- a/src/FSharp.Core/prim-types.fsi
+++ b/src/FSharp.Core/prim-types.fsi
@@ -3758,6 +3758,8 @@ namespace Microsoft.FSharp.Core
                                 and ^Step: (static member Zero: ^Step)
                                 and ^T: equality
                                 and ^T: comparison                                
+                                and ^Step: equality
+                                and ^Step: comparison                                
                                 and default ^Step: ^T
                                 and default ^T: int