diff --git a/reactos/services/umpnpmgr/umpnpmgr.c b/reactos/services/umpnpmgr/umpnpmgr.c
index cc2c02bbbaf..9da7d80fd18 100644
--- a/reactos/services/umpnpmgr/umpnpmgr.c
+++ b/reactos/services/umpnpmgr/umpnpmgr.c
@@ -29,6 +29,8 @@
 #define WIN32_NO_STATUS
 #include <windows.h>
 #include <cmtypes.h>
+#include <cmfuncs.h>
+#include <rtlfuncs.h>
 #include <umpnpmgr/sysguid.h>
 #include <wdmguid.h>
 #include <cfgmgr32.h>