diff --git a/src/util/in-memory-storage-persistent.hpp b/src/util/in-memory-storage-persistent.hpp
index 3265f52..7e1a977 100644
--- a/src/util/in-memory-storage-persistent.hpp
+++ b/src/util/in-memory-storage-persistent.hpp
@@ -45,7 +45,7 @@
    *
    *  @return false
    */
-  virtual bool
+  bool
   evictItem() override;
 };