diff --git a/async-graphql-derive/src/utils.rs b/async-graphql-derive/src/utils.rs
index 549043e7..24078008 100644
--- a/async-graphql-derive/src/utils.rs
+++ b/async-graphql-derive/src/utils.rs
@@ -71,7 +71,7 @@ fn parse_nested_validator(
                         let name = &nv.path;
                         if let Lit::Str(value) = &nv.lit {
                             let expr = syn::parse_str::<Expr>(&value.value())?;
-                            params.push(quote! { #name: #expr.into() });
+                            params.push(quote! { #name: (#expr).into() });
                         } else {
                             return Err(Error::new_spanned(
                                 &nv.lit,
@@ -137,7 +137,7 @@ pub fn parse_guards(crate_name: &TokenStream, args: &MetaList) -> Result<Option<
                                         params.push(quote! { #name: &#id });
                                     } else {
                                         let expr = syn::parse_str::<Expr>(&value_str)?;
-                                        params.push(quote! { #name: #expr.into() });
+                                        params.push(quote! { #name: (#expr).into() });
                                     }
                                 } else {
                                     return Err(Error::new_spanned(