diff --git a/src/generator/codegen_register.rs b/src/generator/codegen_register.rs
index b20487f..baefbc3 100644
--- a/src/generator/codegen_register.rs
+++ b/src/generator/codegen_register.rs
@@ -485,7 +485,7 @@ fn generate_multiple_bool_field(
     let code_setter = quote! {
         pub fn #setter_name(self, val: [bool; #num_multiple]) -> Self {
             let mask: #base_type = #mask_name.iter().sum();
-            let update: #base_type = BANK121_GTY_CHANNEL_MASK
+            let update: #base_type = #mask_name
                 .iter()
                 .zip(val)
                 .filter_map(|(mask, val)| val.then_some(mask))