diff --git a/diff/FeedsConfigurable.inc b/diff/FeedsConfigurable.inc
index 0b9b620..a23c9b6 100644
--- a/diff/FeedsConfigurable.inc
+++ b/diff/FeedsConfigurable.inc
@@ -146,7 +146,8 @@ abstract class FeedsConfigurable {
    */
   public function getConfig() {
     $defaults = $this->configDefaults();
-    return $this->config + $defaults;
+   $cnf = $this->config;
+       return (array)$cnf + (array)$defaults;
   }

   /**