diff --git a/chrome/content/zotero/lookup.js b/chrome/content/zotero/lookup.js
index 418e0f4bd..b6dc36d7e 100644
--- a/chrome/content/zotero/lookup.js
+++ b/chrome/content/zotero/lookup.js
@@ -91,6 +91,19 @@ const Zotero_Lookup = new function () {
 		return false;
 	}
 	
+	/**
+	 * Handles a key press
+	 */
+	this.onKeyPress = function(event) {
+		var keyCode = event.keyCode;
+		if(keyCode === 13 || keyCode === 14) {
+			Zotero_Lookup.accept();
+		} else if(keyCode == event.DOM_VK_ESCAPE) {
+			document.getElementById("zotero-lookup-panel").hidePopup();
+		}
+		return true;
+	}
+	
 	/**
 	 * Focuses the field
 	 */
diff --git a/chrome/content/zotero/zoteroPane.xul b/chrome/content/zotero/zoteroPane.xul
index 2d17a8d24..f4e94f9c5 100644
--- a/chrome/content/zotero/zoteroPane.xul
+++ b/chrome/content/zotero/zoteroPane.xul
@@ -145,7 +145,7 @@
 								onpopuphidden="Zotero_Lookup.onHidden()" noautohide="true">
 							<vbox>
 								<description>&zotero.lookup.description;</description>
-								<textbox id="zotero-lookup-textbox" style="margin: 2px 0 2px 0" onkeypress="if([13, 14].indexOf(event.keyCode) !== -1) { Zotero_Lookup.accept(); } return true;" flex="1"/>
+								<textbox id="zotero-lookup-textbox" style="margin: 2px 0 2px 0" onkeypress="return Zotero_Lookup.onKeyPress(event)" flex="1"/>
 								<hbox>
 									<toolbarbutton class="zotero-small-progress-indicator" id="zotero-lookup-progress"/>
 									<spacer flex="1"/>