diff --git a/src/linkahead/common/models.py b/src/linkahead/common/models.py
index c9c5cb773940f705ad2ddbb81186bacd4797d34b..970d373a6cda57e87bf5abfdf7362c24e911d42f 100644
--- a/src/linkahead/common/models.py
+++ b/src/linkahead/common/models.py
@@ -109,7 +109,7 @@ FIX = "FIX"
 ALL = "ALL"
 NONE = "NONE"
 if TYPE_CHECKING:
-    INHERITANCE = Literal["OBLIGATORY", "SUGGESTED", "RECOMMENDED", "ALL", "NONE"]
+    INHERITANCE = Literal["OBLIGATORY", "SUGGESTED", "RECOMMENDED", "ALL", "NONE", "FIX"]
     IMPORTANCE = Literal["OBLIGATORY", "RECOMMENDED", "SUGGESTED", "FIX", "NONE"]
 
 SPECIAL_ATTRIBUTES = ["name", "role", "datatype", "description",