diff --git a/install-dev/upgrade/php/p15018_change_image_types.php b/install-dev/upgrade/php/p15018_change_image_types.php
index f7ebcf3c9..37cc9c5d8 100644
--- a/install-dev/upgrade/php/p15018_change_image_types.php
+++ b/install-dev/upgrade/php/p15018_change_image_types.php
@@ -72,7 +72,7 @@ function p15018_change_image_types()
 						$option
 					);
 			$folder = implode(DIRECTORY_SEPARATOR, str_split((string)$row['id_image'])).DIRECTORY_SEPARATOR;
-			if (file_exists(_PS_ROOT_DIR_.'img'.DIRECTORY_SEPARATOR.'p'.DIRECTORY_SEPARATOR.$folder.$row['id_image'].'.jpg'))
+			if (file_exists(_PS_ROOT_DIR_.DIRECTORY_SEPARATOR.'img'.DIRECTORY_SEPARATOR.'p'.DIRECTORY_SEPARATOR.$folder.$row['id_image'].'.jpg'))
 				foreach ($replace_types['products'] as $old_type => $new_type)
 					p15018_copy_or_rename(
 						_PS_ROOT_DIR_.DIRECTORY_SEPARATOR.'img'.DIRECTORY_SEPARATOR.'p'.DIRECTORY_SEPARATOR.$folder.$row['id_image'].'-'.$old_type.'.jpg',