diff --git a/webif/html/pkg/script.js b/webif/html/pkg/script.js
index 114c442..bdbd557 100644
--- a/webif/html/pkg/script.js
+++ b/webif/html/pkg/script.js
@@ -139,7 +139,8 @@ function execopkg(arg, pkg)
 		error: function(_, _, e) {
 			if (window.console)
 				console.log("ajax error");
-			alert(e);
+			if (e.length)
+				alert(e);
 		}
 	});
 	busy = false;