diff --git a/chrome/content/zotero/xpcom/utilities.js b/chrome/content/zotero/xpcom/utilities.js
index 88886ba26..527f8a0ac 100644
--- a/chrome/content/zotero/xpcom/utilities.js
+++ b/chrome/content/zotero/xpcom/utilities.js
@@ -569,8 +569,8 @@ Zotero.Utilities.prototype.processAsync = function (sets, callbacks, onDone) {
 		callbacks[0](currentSet, nextCallback);
 	};
 	var nextCallback = function () {
-		callbacks[index](currentSet, nextCallback);
 		index++;
+		callbacks[index](currentSet, nextCallback);
 	};
 	
 	// Add a final callback to proceed to the next set