diff --git a/Cargo.toml b/Cargo.toml
index f99b48f..1454ec9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ repository = "https://github.com/dtolnay/quote"
 rust-version = "1.31"
 
 [dependencies]
-proc-macro2 = { version = "1.0.40", default-features = false }
+proc-macro2 = { version = "1.0.52", default-features = false }
 
 [dev-dependencies]
 rustversion = "1.0"
diff --git a/src/spanned.rs b/src/spanned.rs
index f64c8f5..316d0b7 100644
--- a/src/spanned.rs
+++ b/src/spanned.rs
@@ -1,4 +1,5 @@
 use crate::ToTokens;
+use proc_macro2::extra::DelimSpan;
 use proc_macro2::{Span, TokenStream};
 
 pub trait Spanned {
@@ -11,6 +12,12 @@ impl Spanned for Span {
     }
 }
 
+impl Spanned for DelimSpan {
+    fn __span(&self) -> Span {
+        self.join()
+    }
+}
+
 impl<T: ?Sized + ToTokens> Spanned for T {
     fn __span(&self) -> Span {
         join_spans(self.into_token_stream())