diff --git a/codegen/gql_code_builder/lib/src/common.dart b/codegen/gql_code_builder/lib/src/common.dart
index 20a6c73e..4d2022e1 100644
--- a/codegen/gql_code_builder/lib/src/common.dart
+++ b/codegen/gql_code_builder/lib/src/common.dart
@@ -48,6 +48,7 @@ const _reserved = <String>[
   "List",
   "Set",
   "update",
+  "input",
   "values",
 ];