diff --git a/src/extras/BitmapText.js b/src/extras/BitmapText.js
index e4a7ddc..eddb52e 100644
--- a/src/extras/BitmapText.js
+++ b/src/extras/BitmapText.js
@@ -191,8 +191,12 @@
         },
         set: function (value)
         {
+            value = value.toString() || ' ';
+            if (this._text === value)
+            {
+                return;
+            }
             this._text = value;
-
             this.dirty = true;
         }
     }