diff --git a/lib/OpenLayers/Layer/WMS.js b/lib/OpenLayers/Layer/WMS.js
index af83b29278..c0431a16e1 100644
--- a/lib/OpenLayers/Layer/WMS.js
+++ b/lib/OpenLayers/Layer/WMS.js
@@ -21,9 +21,6 @@ OpenLayers.Layer.WMS.prototype =
                       format: "image/jpeg"
                      },
 
-    /** @type Boolean */
-    isBaseLayer: null,
-
     /**
     * @constructor
     *
diff --git a/lib/OpenLayers/Layer/WMS/Untiled.js b/lib/OpenLayers/Layer/WMS/Untiled.js
index 0ef19e26c0..bd674eae8f 100644
--- a/lib/OpenLayers/Layer/WMS/Untiled.js
+++ b/lib/OpenLayers/Layer/WMS/Untiled.js
@@ -22,10 +22,6 @@ OpenLayers.Layer.WMS.Untiled.prototype =
                       format: "image/jpeg"
                      },
 
-    
-    /** @type Boolean */
-    isBaseLayer: null,
-    
     /** @type DOMElement */
     imgDiv: null,