diff --git a/reactos/lib/mpr/mpr_main.c b/reactos/lib/mpr/mpr_main.c
index 49c49258a78..b9446496150 100644
--- a/reactos/lib/mpr/mpr_main.c
+++ b/reactos/lib/mpr/mpr_main.c
@@ -22,6 +22,7 @@
 
 #include "windef.h"
 #include "winbase.h"
+#include "objbase.h"
 #include "winnetwk.h"
 #include "wine/debug.h"
 #include "wnetpriv.h"