diff --git a/lib/cpp/test/TransportTest.cpp b/lib/cpp/test/TransportTest.cpp
index d12e384..767e563 100644
--- a/lib/cpp/test/TransportTest.cpp
+++ b/lib/cpp/test/TransportTest.cpp
@@ -127,6 +127,7 @@
 template <class Transport_>
 class CoupledTransports {
  public:
+  virtual ~CoupledTransports() {}
   typedef Transport_ TransportType;
 
   CoupledTransports() : in(), out() {}