diff --git a/chrome/content/zotero/lookup.js b/chrome/content/zotero/lookup.js
index 84d062e8cf..eccf91703e 100644
--- a/chrome/content/zotero/lookup.js
+++ b/chrome/content/zotero/lookup.js
@@ -120,7 +120,9 @@ const Zotero_Lookup = new function () {
 	/**
 	 * Cancels the popup and resets fields
 	 */
-	this.onHidden = function() {
-		document.getElementById("zotero-lookup-textbox").value = "";
+	this.onHidden = function(event) {
+		if (event.target.id == 'zotero-lookup-panel') {
+			document.getElementById("zotero-lookup-textbox").value = "";
+		}
 	}
 }
diff --git a/chrome/content/zotero/zoteroPane.xul b/chrome/content/zotero/zoteroPane.xul
index 1f1b71eac3..45a0f29d33 100644
--- a/chrome/content/zotero/zoteroPane.xul
+++ b/chrome/content/zotero/zoteroPane.xul
@@ -142,7 +142,7 @@
 					<toolbarbutton id="zotero-tb-item-from-page" class="zotero-tb-button" tooltiptext="&zotero.toolbar.newItemFromPage.label;" command="cmd_zotero_newItemFromCurrentPage"/>
 					<toolbarbutton id="zotero-tb-lookup" class="zotero-tb-button" tooltiptext="&zotero.toolbar.lookup.label;" type="panel">
 						<panel id="zotero-lookup-panel" type="arrow" onpopupshown="Zotero_Lookup.onShowing()"
-								onpopuphidden="Zotero_Lookup.onHidden()">
+								onpopuphidden="Zotero_Lookup.onHidden(event)">
 							<vbox>
 								<description>&zotero.lookup.description;</description>
 								<stack>