diff --git a/js/prefs.js b/js/prefs.js
index 1b32c65cb..747eb4105 100755
--- a/js/prefs.js
+++ b/js/prefs.js
@@ -155,7 +155,10 @@ require(["dojo/_base/kernel",
 			App = new _App();
 
 		} catch (e) {
-			this.Error.report(e);
+			if (App && App.Error)
+				App.Error.report(e);
+			else
+				alert(e + "\n\n" + e.stack);
 		}
 	});
 });
diff --git a/js/tt-rss.js b/js/tt-rss.js
index 5e044625d..8868fa7a5 100644
--- a/js/tt-rss.js
+++ b/js/tt-rss.js
@@ -592,7 +592,10 @@ require(["dojo/_base/kernel",
 
 			App = new _App();
 		} catch (e) {
-			App.Error.report(e);
+			if (App && App.Error)
+				App.Error.report(e);
+			else
+				alert(e + "\n\n" + e.stack);
 		}
 	});
 });