diff --git a/libraries/Datatable.php b/libraries/Datatable.php
index d7f2363..8a47062 100644
--- a/libraries/Datatable.php
+++ b/libraries/Datatable.php
@@ -190,7 +190,8 @@ public function datatableJson($formats = array(), $debug = FALSE)
             $selectArray[] = $c['data'];
         }
         if ($this->rowIdCol !== NULL && in_array($this->rowIdCol, $selectArray) === FALSE) {
-            $selectArray[] = $this->rowIdCol;
+            $tableName = explode('.',$selectArray[0])[0];
+            $selectArray[] = "{$tableName}.{$this->rowIdCol}";
         }
 
         //put the select string together
@@ -457,4 +458,4 @@ public function whereClauseArray();
 }
 
 // END Datatable Class
-/* End of file Datatable.php */
\ No newline at end of file
+/* End of file Datatable.php */