diff --git a/reactos/include/psdk/winnt.h b/reactos/include/psdk/winnt.h
index 33ed3230971..34aa244b5ba 100644
--- a/reactos/include/psdk/winnt.h
+++ b/reactos/include/psdk/winnt.h
@@ -4145,7 +4145,7 @@ static __inline__ struct _TEB * NtCurrentTeb(void)
 #elif defined (_M_AMD64)
 FORCEINLINE struct _TEB * NtCurrentTeb(VOID)
 {
-    return __readgsqword(FIELD_OFFSET(NT_TIB, Self));
+    return (struct _TEB *)__readgsqword(FIELD_OFFSET(NT_TIB, Self));
 }
 #else
 static __inline__ struct _TEB * NtCurrentTeb(void)