diff --git a/lib/OpenLayers/WPSProcess.js b/lib/OpenLayers/WPSProcess.js
index 0e7f6e22df..619972565f 100644
--- a/lib/OpenLayers/WPSProcess.js
+++ b/lib/OpenLayers/WPSProcess.js
@@ -349,7 +349,7 @@ OpenLayers.WPSProcess = OpenLayers.Class({
      */
     setResponseForm: function(options) {
         options = options || {};
-        output = this.description.processOutputs[options.outputIndex || 0];
+        var output = this.description.processOutputs[options.outputIndex || 0];
         this.description.responseForm = {
             rawDataOutput: {
                 identifier: output.identifier,