diff --git a/lib/query_patch.rb b/lib/query_patch.rb
index 5fac795..f89b73a 100644
--- a/lib/query_patch.rb
+++ b/lib/query_patch.rb
@@ -41,16 +41,19 @@ module QueryPatch
     end
     
     def available_filters_with_qbo
-      return @available_filters if @available_filters 
-      @available_filters = available_filters_without_qbo 
+      unless @available_filters
+        @available_filters = available_filters_without_qbo 
         
-      qbo_filters = {
-        "customer" => { 
-          :name => l(:field_qbo_customer),
-          :type => :text, 
-          :order => @available_filters.size + 1},
-      }
-      return @available_filters.merge!(qbo_filters)
+        qbo_filters = {
+          "customer" => { 
+            :name => l(:field_qbo_customer),
+            :type => :text, 
+            :order => @available_filters.size + 1},
+        }
+        
+        @available_filters.merge!(qbo_filters)
+      end
+      @available_filters
     end
   end
 end