diff --git a/include/filter.php b/include/filter.php
index 14e3ae3..37edf6e 100644
--- a/include/filter.php
+++ b/include/filter.php
@@ -37,7 +37,10 @@ function filter_gpc()
         //       against a value, otherwise if strpos() returns false indicating that
         //       the value wasn't found strpos(something) == 0 will still be true
         if((strpos($aKeys[$i], "Dialog") === 0) ||
-           (strpos($aKeys[$i], "XinhaColorPicker") === 0)) // Xinha variables
+           (strpos($aKeys[$i], "XinhaColorPicker") === 0) || // Xinha variables
+           ($aKeys[$i] == "cx") ||   // google custom search variable
+           ($aKeys[$i] == "cof"))    // google custom search variable
+
         {
             // copy the key over to the clean array
             // NOTE: we do not strip html tags or trim any Xinha variables