diff --git a/src/libutil/config.hh b/src/libutil/config.hh
index c0c59ac68..e98e09bf7 100644
--- a/src/libutil/config.hh
+++ b/src/libutil/config.hh
@@ -115,6 +115,8 @@ public:
      * Re-applies all previously attempted changes to unknown settings
      */
     void reapplyUnknownSettings();
+
+    virtual ~AbstractConfig() = default;
 };
 
 /**