diff --git a/scripts/upgrade b/scripts/upgrade
index 9fbbf81..c3c65f4 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -68,7 +68,7 @@ ynh_system_user_create --username=$app --home_dir="$final_path"
 
 if [ "$upgrade_type" == "UPGRADE_APP" ]
 then
-	ynh_script_progression --message="Upgrading source files..."=1
+	ynh_script_progression --message="Upgrading source files..."
 
 	# Download, check integrity, uncompress and patch the source from app.src
 	ynh_setup_source --dest_dir="$final_path" --keep=".env"