diff --git a/lib/ext2fs/unix_io.c b/lib/ext2fs/unix_io.c
index 1af246d..cb408f5 100644
--- a/lib/ext2fs/unix_io.c
+++ b/lib/ext2fs/unix_io.c
@@ -734,6 +734,7 @@
 					retval2);
 				if (err_buf)
 					ext2fs_free_mem(&err_buf);
+				mutex_lock(data, CACHE_MTX);
 				goto retry;
 			} else
 				cache->write_err = 0;