diff --git a/js/Boot.hx b/js/Boot.hx
index 381fecd49..1db6fcb54 100644
--- a/js/Boot.hx
+++ b/js/Boot.hx
@@ -24,11 +24,12 @@ package js;
 private class HaxeError extends js.Error {
 
 	var val:Dynamic;
-	
-	public function new(val:Dynamic) {
+
+	public function new(val:Dynamic) untyped {
 		super();
-		this.val = untyped __define_feature__("js.Boot.HaxeError", val);
-		untyped if (js.Error.captureStackTrace) js.Error.captureStackTrace(this, HaxeError);
+		this.val = __define_feature__("js.Boot.HaxeError", val);
+		this.message = String(val);
+		if (js.Error.captureStackTrace) js.Error.captureStackTrace(this, HaxeError);
 	}
 }