diff --git a/source/libs/wal/src/walWrite.c b/source/libs/wal/src/walWrite.c
index b3c5f30ba3..6503ffdd02 100644
--- a/source/libs/wal/src/walWrite.c
+++ b/source/libs/wal/src/walWrite.c
@@ -508,7 +508,7 @@ int32_t walEndSnapshot(SWal *pWal) {
   taosArrayClear(pWal->toDeleteFiles);
 
 _exit:
-  taosThreadRwlockWrlock(&pWal->mutex);
+  taosThreadRwlockUnlock(&pWal->mutex);
 
   if (code) {
     wError("vgId:%d, %s failed at line %d since %s", pWal->cfg.vgId, __func__, lino, tstrerror(code));