diff --git a/jquery.dfp.js b/jquery.dfp.js
index be68354..515a8af 100644
--- a/jquery.dfp.js
+++ b/jquery.dfp.js
@@ -476,7 +476,13 @@
                 $.each(dimensionGroups, function (k, v) {
 
                     var dimensionSet = v.split('x');
-                    dimensions.push([parseInt(dimensionSet[0], 10), parseInt(dimensionSet[1], 10)]);
+
+                    if(/fluid/.test(dimensionSet)){
+                        dimensionSet =  dimensionSet[0].replace(/[^a-z0-9]/gi,'');
+                        dimensions.push([dimensionSet]);
+                    }else{
+                        dimensions.push([parseInt(dimensionSet[0], 10), parseInt(dimensionSet[1], 10)]);
+                    }
 
                 });