diff --git a/libunwindstack/include/unwindstack/Memory.h b/libunwindstack/include/unwindstack/Memory.h
index dba41d1c7..b3beb6eae 100644
--- a/libunwindstack/include/unwindstack/Memory.h
+++ b/libunwindstack/include/unwindstack/Memory.h
@@ -101,7 +101,7 @@ class MemoryFileAtOffset : public Memory {
 
   size_t Size() { return size_; }
 
-  void Clear();
+  void Clear() override;
 
  protected:
   size_t size_ = 0;