1 files changed, 6 insertions, 2 deletions
diff --git a/src/Common/src/TypeSystem/IL/Stubs/CalliIntrinsic.cs b/src/Common/src/TypeSystem/IL/Stubs/CalliIntrinsic.cs
index 28ae8b621..2a39b7779 100644
--- a/src/Common/src/TypeSystem/IL/Stubs/CalliIntrinsic.cs
+++ b/src/Common/src/TypeSystem/IL/Stubs/CalliIntrinsic.cs
@@ -18,7 +18,7 @@ namespace Internal.IL.Stubs
     {
         public static MethodIL EmitIL(MethodDesc target)
         {
-            Debug.Assert(target.Name == "Call");
+            Debug.Assert(target.Name == "Call" || target.Name.StartsWith("StdCall"));
             Debug.Assert(target.Signature.Length > 0
                 && target.Signature[0] == target.Context.GetWellKnownType(WellKnownType.IntPtr));
 
@@ -44,7 +44,11 @@ namespace Internal.IL.Stubs
                 parameters[i - 1] = template[i];
             }
 
-            var signature = new MethodSignature(template.Flags, 0, returnType, parameters);
+            MethodSignatureFlags flags = template.Flags;
+            if (target.Name == "StdCall")
+                flags |= MethodSignatureFlags.UnmanagedCallingConventionStdCall;
+
+            var signature = new MethodSignature(flags, 0, returnType, parameters);
             codeStream.Emit(ILOpcode.calli, emitter.NewToken(signature));
             codeStream.Emit(ILOpcode.ret);