diff --git a/reactos/drivers/bus/pcix/guid.c b/reactos/drivers/bus/pcix/guid.c
index 78a272379ea..5200a01ad1f 100644
--- a/reactos/drivers/bus/pcix/guid.c
+++ b/reactos/drivers/bus/pcix/guid.c
@@ -1,5 +1,6 @@
 /* DO NOT USE THE PRECOMPILED HEADER FOR THIS FILE! */
 
+#include <wdm.h>
 #include <initguid.h>
 #include <ntddk.h>
 #include <wdmguid.h>