diff --git a/include/rde_common.h b/include/rde_common.h
index f377507..bc5498c 100644
--- a/include/rde_common.h
+++ b/include/rde_common.h
@@ -34,6 +34,7 @@
         bejErrorUnknownProperty,
         bejErrorInvalidSchemaType,
         bejErrorInvalidPropertyOffset,
+        bejErrorNullParameter,
     };
 
     /**