diff --git a/js/datatable.js b/js/datatable.js
index 27fcf9dd6..37c0efd27 100644
--- a/js/datatable.js
+++ b/js/datatable.js
@@ -53,7 +53,7 @@ $(function()
 			oParams.operation = 'datatable';
 			
 			oParams.filter = this.options.sFilter;
-			oParams.extra_param = this.options.oExtraParams;
+			oParams.extra_param = JSON.stringify(this.options.oExtraParams);
 			oParams.start = 0;
 			oParams.end = this.options.iPageSize;
 			oParams.select_mode = this.options.sSelectMode;