diff --git a/gcc/rust/util/rust-stacked-contexts.h b/gcc/rust/util/rust-stacked-contexts.h
index 86cdf9f88d2a..603db5627e94 100644
--- a/gcc/rust/util/rust-stacked-contexts.h
+++ b/gcc/rust/util/rust-stacked-contexts.h
@@ -71,6 +71,12 @@ template <typename T> class StackedContexts
     return last;
   }
 
+  const T& peek() {
+    rust_assert (!stack.empty());
+
+    return stack.back();
+  }
+
   /**
    * Are we currently inside of a special context?
    */