diff --git a/sys/sys/callout.h b/sys/sys/callout.h
index 536a0c54c8e5..f5c75ecc25ee 100644
--- a/sys/sys/callout.h
+++ b/sys/sys/callout.h
@@ -71,8 +71,8 @@ void	_callout_init_lock(struct callout *, struct lock_object *, int);
 #define	callout_init_mtx(c, mtx, flags)					\
 	_callout_init_lock((c), ((mtx) != NULL) ? &(mtx)->lock_object :	\
 	    NULL, (flags))
-#define	callout_init_rm(c, rm, flags)
-	_callout_init_lock((c), ((rm != NULL) ? &(rm)->lock_object : \
+#define	callout_init_rm(c, rm, flags)					\
+	_callout_init_lock((c), ((rm != NULL) ? &(rm)->lock_object : 	\
 	    NULL, (flags))
 #define	callout_init_rw(c, rw, flags)					\
 	_callout_init_lock((c), ((rw) != NULL) ? &(rw)->lock_object :	\