diff --git a/sys/sys/rman.h b/sys/sys/rman.h
index 6bec626115f7..68dd1bde6e63 100644
--- a/sys/sys/rman.h
+++ b/sys/sys/rman.h
@@ -34,6 +34,9 @@
 
 #ifndef	_KERNEL
 #include <sys/queue.h>
+#else
+#include <machine/bus.h>
+#include <machine/resource.h>
 #endif
 
 #define	RF_ALLOCATED	0x0001	/* resource has been reserved */