diff --git a/install-dev/upgrade/php/deactivate_custom_modules.php b/install-dev/upgrade/php/deactivate_custom_modules.php
index 81467c137..08b326c40 100644
--- a/install-dev/upgrade/php/deactivate_custom_modules.php
+++ b/install-dev/upgrade/php/deactivate_custom_modules.php
@@ -31,7 +31,7 @@ function deactivate_custom_modules()
 	$modules = scandir(_PS_MODULE_DIR_);
 	foreach ($modules AS $name)
 	{
-		if (is_dir(_PS_MODULE_DIR_.$name) && file_exists(_PS_MODULE_DIR_.$name.'/'.$name.'.php'))
+		if (is_dir(_PS_MODULE_DIR_.$name.'/') && file_exists(_PS_MODULE_DIR_.$name.'/'.$name.'.php'))
 		{
 			if (!preg_match('/^[a-zA-Z0-9_-]+$/', $name))
 				die(Tools::displayError().' (Module '.$name.')');