diff --git a/src/coreclr/tools/Common/TypeSystem/Interop/IL/Marshaller.cs b/src/coreclr/tools/Common/TypeSystem/Interop/IL/Marshaller.cs
index 7f67f923030140..c5b17ef7ede85b 100644
--- a/src/coreclr/tools/Common/TypeSystem/Interop/IL/Marshaller.cs
+++ b/src/coreclr/tools/Common/TypeSystem/Interop/IL/Marshaller.cs
@@ -1078,6 +1078,8 @@ protected virtual void EmitElementCount(ILCodeStream codeStream, MarshalDirectio
 
                     if (sizeConst.HasValue)
                         codeStream.Emit(ILOpcode.add);
+
+                    codeStream.Emit(ILOpcode.conv_ovf_i4);
                 }
 
                 if (!sizeConst.HasValue && !sizeParamIndex.HasValue)