diff --git a/migrationitem.py b/migrationitem.py
index 6b68cd7..6dace15 100644
--- a/migrationitem.py
+++ b/migrationitem.py
@@ -36,7 +36,7 @@ class MigrationItem:
             self._set_name(name)
 
     def __str__(self):
-        if self._versionned and not self.version is None:
+        if self._versionned and self.version is not None:
             return self.name
         else:
             return self.uvname