diff --git a/block/file-posix.c b/block/file-posix.c
index 6e24083f3f..f37dfc10b3 100644
--- a/block/file-posix.c
+++ b/block/file-posix.c
@@ -1625,17 +1625,17 @@ static int handle_aiocb_write_zeroes(void *opaque)
     if (s->has_write_zeroes) {
         int ret = do_fallocate(s->fd, FALLOC_FL_ZERO_RANGE,
                                aiocb->aio_offset, aiocb->aio_nbytes);
-        if (ret == -EINVAL) {
-            /*
-             * Allow falling back to pwrite for file systems that
-             * do not support fallocate() for an unaligned byte range.
-             */
-            return -ENOTSUP;
-        }
-        if (ret == 0 || ret != -ENOTSUP) {
+        if (ret == -ENOTSUP) {
+            s->has_write_zeroes = false;
+        } else if (ret == 0 || ret != -EINVAL) {
             return ret;
         }
-        s->has_write_zeroes = false;
+        /*
+         * Note: Some file systems do not like unaligned byte ranges, and
+         * return EINVAL in such a case, though they should not do it according
+         * to the man-page of fallocate(). Thus we simply ignore this return
+         * value and try the other fallbacks instead.
+         */
     }
 #endif