diff --git a/dblayeroo.php b/dblayeroo.php
index ad24446..0740993 100644
--- a/dblayeroo.php
+++ b/dblayeroo.php
@@ -2148,8 +2148,17 @@ class dblayeroo
                                 $this->sep.".".$o;
         }
       }
+      elseif ($this->displayColumn !== null)
+      {
+        foreach ($this->displayColumn as $name)
+        {
+          $localGroupBy[] = $this->displayConvert ($name, true);
+        }
+      }
       else
-        $localGroupBy = $this->displayGet (true);
+      {
+        // Nothing to return if there is no groupBy and nothing to display
+      }
     }
     else
     {