diff --git a/lib/OpenLayers/Layer.js b/lib/OpenLayers/Layer.js
index 1a2a1999e4..788b6e7633 100644
--- a/lib/OpenLayers/Layer.js
+++ b/lib/OpenLayers/Layer.js
@@ -34,7 +34,7 @@ OpenLayers.Layer = OpenLayers.Class({
     div: null,
 
     /**
-     * Property: opacity
+     * APIProperty: opacity
      * {Float} The layer's opacity. Float number between 0.0 and 1.0. Default
      * is 1.
      */