diff --git a/src/mem/cache/cache_blk.hh b/src/mem/cache/cache_blk.hh
index c16e59980a..bcd5c4b1b5 100644
--- a/src/mem/cache/cache_blk.hh
+++ b/src/mem/cache/cache_blk.hh
@@ -160,7 +160,7 @@ class CacheBlk : public TaggedEntry
     /**
      * Invalidate the block and clear all state.
      */
-    virtual void invalidate()
+    virtual void invalidate() override
     {
         TaggedEntry::invalidate();