diff --git a/airone/lib/types.py b/airone/lib/types.py
index 4ad651b99..e6e1fae9c 100644
--- a/airone/lib/types.py
+++ b/airone/lib/types.py
@@ -3,7 +3,7 @@
 
 
 @enum.unique
-class AttrType(enum.IntFlag):
+class AttrType(enum.IntEnum):
     OBJECT = 1 << 0
     STRING = 1 << 1
     TEXT = 1 << 2