diff --git a/prel b/prel
index 86a37a0..0795ef0 100755
--- a/prel
+++ b/prel
@@ -139,6 +139,9 @@ if [ "$action" == auto ]; then
         action=merge
     elif [ -n "$checkout" ]; then
         action=checkout
+    else
+        # checkout par défaut
+        action=checkout
     fi
 fi