diff --git a/libraries/joomla/database/query.php b/libraries/joomla/database/query.php
index d533c0bfb7bc3..753f55d93108c 100644
--- a/libraries/joomla/database/query.php
+++ b/libraries/joomla/database/query.php
@@ -374,14 +374,14 @@ public function __toString()
 					$query .= (string) $this->having;
 				}
 
-				if ($this->order)
+				if ($this->union)
 				{
-					$query .= (string) $this->order;
+					$query .= (string) $this->union;
 				}
 
-				if ($this->union)
+				if ($this->order)
 				{
-					$query .= (string) $this->union;
+					$query .= (string) $this->order;
 				}
 
 				break;