diff --git a/chrome/content/zotero/xpcom/storage/request.js b/chrome/content/zotero/xpcom/storage/request.js
index b62532a86a..daf8ea7d9a 100644
--- a/chrome/content/zotero/xpcom/storage/request.js
+++ b/chrome/content/zotero/xpcom/storage/request.js
@@ -314,7 +314,7 @@ Zotero.Sync.Storage.Request.prototype.stop = function (force) {
 		this._forceFinish = true;
 	}
 	
-	if (this.channel) {
+	if (this.channel && this.channel.isPending()) {
 		this._stopping = true;
 		
 		try {