diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c
--- a/sys/kern/vfs_bio.c
+++ b/sys/kern/vfs_bio.c
@@ -3464,7 +3464,7 @@
 		 * to avoid endless loops on unlockable buffers.
 		 */
 		mtx_lock(&bdlock);
-		if (!BIT_EMPTY(BUF_DOMAINS, &bdlodirty)) {
+		if (BIT_EMPTY(BUF_DOMAINS, &bdlodirty)) {
 			/*
 			 * We reached our low water mark, reset the
 			 * request and sleep until we are needed again.