Index: sys/kern/kern_intr.c
===================================================================
--- sys/kern/kern_intr.c	(revision 228491)
+++ sys/kern/kern_intr.c	(working copy)
@@ -1449,7 +1449,7 @@
 		 * their own
 		 */
 		if (!thread) {
-			if (ret == FILTER_SCHEDULE_THREAD)
+			if (ret & FILTER_SCHEDULE_THREAD)
 				thread = 1;
 		}
 	}