diff --git a/chrome/content/zotero/xpcom/storage.js b/chrome/content/zotero/xpcom/storage.js
index cf177a52f..ec5147b4f 100644
--- a/chrome/content/zotero/xpcom/storage.js
+++ b/chrome/content/zotero/xpcom/storage.js
@@ -508,7 +508,7 @@ Zotero.Sync.Storage = new function () {
 		
 		// Can only handle 999 bound parameters at a time
 		var numIDs = itemIDs.length;
-		var maxIDs = 999;
+		var maxIDs = 990;
 		var done = 0;
 		var rows = [];