diff --git a/buffet/commands/schema_constants.h b/buffet/commands/schema_constants.h
index 450ad37..6f5ee71 100644
--- a/buffet/commands/schema_constants.h
+++ b/buffet/commands/schema_constants.h
@@ -47,6 +47,7 @@
 extern const char kOneOf_Metadata[];
 
 extern const char kObject_Properties[];
+extern const char kObject_AdditionalProperties[];
 
 extern const char kCommand_Id[];
 extern const char kCommand_Name[];