diff --git a/phpBB/phpbb/db/driver/driver.php b/phpBB/phpbb/db/driver/driver.php
index e497e6dda1..7e2d7a5ea6 100644
--- a/phpBB/phpbb/db/driver/driver.php
+++ b/phpBB/phpbb/db/driver/driver.php
@@ -915,7 +915,7 @@ abstract class driver implements driver_interface
 
 		}
 
-		if($operation === 'NOT')
+		if ($operation === 'NOT')
 		{
 			$operations_ary =  implode("", $operations_ary);
 		}