diff --git a/serde_codegen/src/de.rs b/serde_codegen/src/de.rs
index ec2f9026..4e74b5fa 100644
--- a/serde_codegen/src/de.rs
+++ b/serde_codegen/src/de.rs
@@ -651,14 +651,6 @@ fn deserialize_field_visitor(
         Some(quote!(__ignore,))
     };
 
-    let field_enum = quote! {
-        #[allow(non_camel_case_types)]
-        enum __Field {
-            #(field_idents,)*
-            #ignore_variant
-        }
-    };
-
     let index_field_arms: Vec<_> = field_idents.iter()
         .enumerate()
         .map(|(field_index, field_ident)| {
@@ -745,6 +737,14 @@ fn deserialize_field_visitor(
         }
     };
 
+    let field_enum = quote! {
+        #[allow(non_camel_case_types)]
+        enum __Field {
+            #(field_idents,)*
+            #ignore_variant
+        }
+    };
+
     let impl_item = quote! {
         impl _serde::de::Deserialize for __Field {
             #[inline]