diff --git a/src/mem/cache/blk.hh b/src/mem/cache/blk.hh
index 1b796608f6..48deef52a4 100644
--- a/src/mem/cache/blk.hh
+++ b/src/mem/cache/blk.hh
@@ -166,7 +166,7 @@ class CacheBlk : public ReplaceableEntry
     std::list<Lock> lockList;
 
   public:
-    CacheBlk()
+    CacheBlk() : data(nullptr)
     {
         invalidate();
     }