diff --git a/src/msw/ole/uuid.cpp b/src/msw/ole/uuid.cpp
index 6c08eb4540..7cc0c34d0e 100644
--- a/src/msw/ole/uuid.cpp
+++ b/src/msw/ole/uuid.cpp
@@ -138,7 +138,7 @@ bool Uuid::Set(const wxChar *pc)
 {
   // get UUID from string
 #ifdef _UNICODE
-  if (UuidFromString(reinterpret_cast<RPC_WSTR>(const_cast<wxChar*>(pc)), &m_uuid) != RPC_S_OK)
+  if ( UuidFromString(reinterpret_cast<unsigned short *>(const_cast<wxChar*>(pc)), &m_uuid) != RPC_S_OK )
 #else
   if ( UuidFromString((wxUChar *)pc, &m_uuid) != RPC_S_OK)
 #endif