diff --git a/MJDownload/MJDownloadManager.m b/MJDownload/MJDownloadManager.m
index c5a039b..9e5545f 100644
--- a/MJDownload/MJDownloadManager.m
+++ b/MJDownload/MJDownloadManager.m
@@ -159,7 +159,7 @@ - (void)notifyStateChange
 #pragma mark - 状态控制
 - (void)setState:(MJDownloadState)state
 {
-    MJDownloadState oldState = self.state;
+    MJDownloadState oldState = _state;
     if (state == oldState) return;
     
     _state = state;