--- src/sys/kern/kern_spinlock.c	2005/08/28 15:27:05	1.1
+++ src/sys/kern/kern_spinlock.c	2005/09/16 21:50:12	1.2
@@ -36,6 +36,7 @@
 #include <sys/types.h>
 #include <machine/atomic.h>
 #include <sys/spinlock.h>
+#include <sys/spinlock2.h>
 
 #define	BACKOFF_INITIAL	1
 #define	BACKOFF_LIMIT	256