diff --git a/lib/OpenLayers/Format/SLD.js b/lib/OpenLayers/Format/SLD.js
index 498e10c4fb..1d9b829ea6 100644
--- a/lib/OpenLayers/Format/SLD.js
+++ b/lib/OpenLayers/Format/SLD.js
@@ -5,6 +5,7 @@
 /**
  * @requires OpenLayers/Format/XML.js
  * @requires OpenLayers/Style.js
+ * @requires OpenLayers/Rule.js
  * @requires OpenLayers/Filter/FeatureId.js
  * @requires OpenLayers/Filter/Logical.js
  * @requires OpenLayers/Filter/Comparison.js