diff --git a/Tests/dblayerooComplet.php b/Tests/dblayerooComplet.php
index a1f3057..f1d015b 100644
--- a/Tests/dblayerooComplet.php
+++ b/Tests/dblayerooComplet.php
@@ -974,4 +974,30 @@ class test_dblayeroo_{ENGINE} extends PHPUnit_Framework_TestCase
     ), $res);
   }
 
+  public function test_displayAdd_MAX1 ()
+  {
+    $tbl2 = $this->tbl2 ();
+    $res = $tbl2->select ()
+                ->displayAdd ("MAX(uid)", "max")
+                ->displayAdd ("gecos")
+                ->orderAdd ("max","ASC")
+                ->execute ();
+    $tbl2->disconnect ();
+    $this->assertSame (array (
+      array ('max' => 1, 'gecos' => 'name'),
+      array ('max' => 4, 'gecos' => 'name2'),
+      array ('max' => 5, 'gecos' => 'name3'),
+      array ('max' => 6, 'gecos' => 'name4')),
+      $res);
+  }
+
+  public function test_displayAdd_MAX2 ()
+  {
+    $tbl2 = $this->tbl2 ();
+    $res = $tbl2->select ()
+                ->displayAdd ("MAX(uid)")
+                ->execute ();
+    $tbl2->disconnect ();
+    $this->assertSame (array (array ('MAX(uid)' => 6)), $res);
+  }
 }
diff --git a/dblayeroo.php b/dblayeroo.php
index cf2698c..33b9089 100644
--- a/dblayeroo.php
+++ b/dblayeroo.php
@@ -2315,7 +2315,8 @@ class dblayeroo
       if ($this->groupByNeeded ())
       {
         $groupByExpression = $this->groupByGet ();
-        $sql .= "\n GROUP BY ". implode (",", $groupByExpression);
+        if (count ($groupByExpression))
+          $sql .= "\n GROUP BY ". implode (",", $groupByExpression);
       }
       if (count ($order))
         $sql .= "\n ORDER BY ". implode (",", $order);