diff --git a/reactos/include/ddk/winddi.h b/reactos/include/ddk/winddi.h
index 258345da5cf..7dd883096c7 100644
--- a/reactos/include/ddk/winddi.h
+++ b/reactos/include/ddk/winddi.h
@@ -1042,6 +1042,8 @@ DWORD APIENTRY EngDeviceIoControl(
 
 VOID STDCALL EngFreeMem(PVOID Mem);
 
+VOID STDCALL EngFreeUserMem(PVOID pv);
+
 /*
 EngDeleteClip
 EngDeleteDriverObj
@@ -1057,7 +1059,6 @@ EngFillPath
 EngFindImageProcAddress
 EngFindResource
 EngFreeModule
-EngFreeUserMem
 EngGetCurrentCodePage
 EngGetDriverName
 EngGetFileChangeTime