diff --git a/chrome/content/zotero/recognizePDFDialog.js b/chrome/content/zotero/recognizePDFDialog.js
index 2481d0d850..5a56782fa3 100644
--- a/chrome/content/zotero/recognizePDFDialog.js
+++ b/chrome/content/zotero/recognizePDFDialog.js
@@ -51,14 +51,7 @@ var Zotero_RecognizePDF_Dialog = new function () {
 	};
 	
 	function close() {
-		if (!_progressWindow) return;
-		Zotero.RecognizePDF.removeListener('rowadded');
-		Zotero.RecognizePDF.removeListener('rowupdated');
-		Zotero.RecognizePDF.removeListener('rowdeleted');
 		_progressWindow.close();
-		_progressWindow = null;
-		_progressIndicator = null;
-		_rowIDs = [];
 	}
 	
 	function _getImageByStatus(status) {
@@ -143,7 +136,15 @@ var Zotero_RecognizePDF_Dialog = new function () {
 				close();
 			}
 		});
-		_progressWindow.addEventListener('close', close.bind(this), false);
+		
+		_progressWindow.addEventListener('unload', function () {
+			Zotero.RecognizePDF.removeListener('rowadded');
+			Zotero.RecognizePDF.removeListener('rowupdated');
+			Zotero.RecognizePDF.removeListener('rowdeleted');
+			_progressWindow = null;
+			_progressIndicator = null;
+			_rowIDs = [];
+		});
 		
 		_updateProgress();
 		
diff --git a/test/tests/recognizePDFTest.js b/test/tests/recognizePDFTest.js
index 5bc9d4ae6a..4a6632698f 100644
--- a/test/tests/recognizePDFTest.js
+++ b/test/tests/recognizePDFTest.js
@@ -19,6 +19,7 @@ describe("PDF Recognition", function() {
 		for(let win of getWindows("chrome://zotero/content/recognizePDFDialog.xul")) {
 			win.close();
 		}
+		Zotero.RecognizePDF.cancel();
 	});
 	
 	after(function() {