diff --git a/include/wx/msw/ole/uuid.h b/include/wx/msw/ole/uuid.h
index 4cd02c9d89..ef82be0371 100644
--- a/include/wx/msw/ole/uuid.h
+++ b/include/wx/msw/ole/uuid.h
@@ -76,7 +76,7 @@ public:
 
   // comparison operators
   bool operator==(const Uuid& uuid) const;
-  bool operator!=(const Uuid& uuid) const;
+  bool operator!=(const Uuid& uuid) const { return !(*this == uuid); }
 
   // accessors
   operator const UUID*()   const { return &m_uuid;               }