diff --git a/include/vmrender.idl b/include/vmrender.idl
index 360b5fee729..3c3fd7bd309 100644
--- a/include/vmrender.idl
+++ b/include/vmrender.idl
@@ -213,7 +213,7 @@ interface IVMRMixerControl : IUnknown
 
 typedef struct tagVMRGUID
 {
-    GUID *pGUID, GUID;
+    struct _GUID *pGUID, GUID;
 } VMRGUID;
 
 #define VMRDEVICENAMELEN 32