diff --git a/mcs/class/corlib/System/Delegate.cs b/mcs/class/corlib/System/Delegate.cs
index 958b70ce816eb373f9f96c1bee29c513284f99d6..7447b4a9e0190ae6b50b4e146549904a50d1fcb2 100644
--- a/mcs/class/corlib/System/Delegate.cs
+++ b/mcs/class/corlib/System/Delegate.cs
@@ -158,6 +158,17 @@ namespace System
 				// Delegate covariance
 				if (!returnType.IsValueType && delReturnType.IsAssignableFrom (returnType))
 					returnMatch = true;
+				else
+				{
+					bool isDelArgEnum = delReturnType.IsEnum;
+					bool isArgEnum = returnType.IsEnum;
+					if (isArgEnum && isDelArgEnum)
+						returnMatch = Enum.GetUnderlyingType(delReturnType) == Enum.GetUnderlyingType(returnType);
+					else if (isDelArgEnum && Enum.GetUnderlyingType(delReturnType) == returnType)
+						returnMatch = true;
+					else if (isArgEnum && Enum.GetUnderlyingType(returnType) == delReturnType)
+						returnMatch = true;
+				}
 			}
 
 			return returnMatch;