diff --git a/lib/std.js b/lib/std.js
index d6e6d6f..d4898ba 100644
--- a/lib/std.js
+++ b/lib/std.js
@@ -358,11 +358,11 @@ function StdEventableObject() {
         for (var i = 0; i < this.__events__.length; i++) {
             var e = this.__events__[i];
             if (e.type == event.type && typeof(e.listener) === "function") {
-				try {
-					e.listener(event, __exception__);
-				} catch (ex) {
-					this.dispatchEvent(new StdEvent("error"), ex);
-				}
+                try {
+                    e.listener(event, __exception__);
+                } catch (ex) {
+                    this.dispatchEvent(new StdEvent("error"), ex);
+                }
             }
         }
     };