diff --git a/reactos/include/ddk/ntddk.h b/reactos/include/ddk/ntddk.h
index f9281f95bac..4189edf733f 100644
--- a/reactos/include/ddk/ntddk.h
+++ b/reactos/include/ddk/ntddk.h
@@ -2772,7 +2772,7 @@ RtlConvertUlongToLuid(
 
 #if defined(_AMD64_) || defined(_IA64_)
 //DECLSPEC_DEPRECATED_DDK_WINXP
-__inline
+FORCEINLINE
 LARGE_INTEGER
 NTAPI_INLINE
 RtlLargeIntegerDivide(