diff --git a/sys/sys/refcount.h b/sys/sys/refcount.h
--- a/sys/sys/refcount.h
+++ b/sys/sys/refcount.h
@@ -65,7 +65,7 @@
 }
 
 static __inline u_int
-refcount_load(volatile u_int *count)
+refcount_load(volatile const u_int *count)
 {
 	return (atomic_load_int(count));
 }