diff --git a/payload_state_interface.h b/payload_state_interface.h
index 1825a40..95344c6 100644
--- a/payload_state_interface.h
+++ b/payload_state_interface.h
@@ -18,6 +18,8 @@
 // object.
 class PayloadStateInterface {
  public:
+  virtual ~PayloadStateInterface() = default;
+
   // Sets the internal payload state based on the given Omaha response. This
   // response could be the same or different from the one for which we've stored
   // the internal state. If it's different, then this method resets all the