diff --git a/src/zone/zone.h b/src/zone/zone.h
index 455b2895e7..3ebcadfa3c 100644
--- a/src/zone/zone.h
+++ b/src/zone/zone.h
@@ -390,9 +390,11 @@ class ScopedPtrList final {
 
   typedef T** iterator;
   inline iterator begin() const {
-    return reinterpret_cast<T**>(&buffer_[start_]);
+    return reinterpret_cast<T**>(buffer_.data() + start_);
+  }
+  inline iterator end() const {
+    return reinterpret_cast<T**>(buffer_.data() + end_);
   }
-  inline iterator end() const { return reinterpret_cast<T**>(&buffer_[end_]); }
 
  private:
   std::vector<void*>& buffer_;