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-rw-r--r--block/null.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/block/null.c b/block/null.c
index 1c56a0ef01..a322929478 100644
--- a/block/null.c
+++ b/block/null.c
@@ -248,7 +248,8 @@ static void null_refresh_filename(BlockDriverState *bs)
     {
         /* These options can be ignored */
         if (strcmp(qdict_entry_key(e), "filename") &&
-            strcmp(qdict_entry_key(e), "driver"))
+            strcmp(qdict_entry_key(e), "driver") &&
+            strcmp(qdict_entry_key(e), NULL_OPT_LATENCY))
         {
             return;
         }