diff --git a/pyo3-macros-backend/src/utils.rs b/pyo3-macros-backend/src/utils.rs
index 3150bb4c..cc35c108 100644
--- a/pyo3-macros-backend/src/utils.rs
+++ b/pyo3-macros-backend/src/utils.rs
@@ -118,9 +118,9 @@ pub fn ensure_not_async_fn(sig: &syn::Signature) -> syn::Result<()> {
     Ok(())
 }
 
-pub fn unwrap_group(expr: &syn::Expr) -> &syn::Expr {
-    match expr {
-        syn::Expr::Group(syn::ExprGroup { expr, .. }) => &*expr,
-        other => other,
+pub fn unwrap_group(mut expr: &syn::Expr) -> &syn::Expr {
+    while let syn::Expr::Group(g) = expr {
+        expr = &*g.expr;
     }
+    expr
 }