diff --git a/freebsd/sys/sys/refcount.h b/freebsd/sys/sys/refcount.h
index 4611664e..32f7f6e4 100644
--- a/freebsd/sys/sys/refcount.h
+++ b/freebsd/sys/sys/refcount.h
@@ -50,7 +50,7 @@ refcount_acquire(volatile u_int *count)
 {
 
 	KASSERT(*count < UINT_MAX, ("refcount %p overflowed", count));
-	atomic_add_acq_int(count, 1);	
+	atomic_add_acq_int((volatile int *)count, 1);	
 }
 
 static __inline int
@@ -59,7 +59,7 @@ refcount_release(volatile u_int *count)
 	u_int old;
 
 	/* XXX: Should this have a rel membar? */
-	old = atomic_fetchadd_int(count, -1);
+	old = atomic_fetchadd_int((volatile int *)count, -1);
 	KASSERT(old > 0, ("negative refcount %p", count));
 	return (old == 1);
 }