diff --git a/test/shared_ptr.cpp b/test/shared_ptr.cpp
index ee007abd..e5f20a73 100644
--- a/test/shared_ptr.cpp
+++ b/test/shared_ptr.cpp
@@ -129,6 +129,7 @@ shared_ptr<Y> factory(int n)
 // regressions from Nicodemus
     struct A
     {
+        virtual ~A() {}; // silence compiler warnings
         virtual int f() = 0;
         static int call_f(shared_ptr<A>& a) { return a->f(); }
     };
diff --git a/test/wrapper_held_type.cpp b/test/wrapper_held_type.cpp
index d5afface..e9942279 100755
--- a/test/wrapper_held_type.cpp
+++ b/test/wrapper_held_type.cpp
@@ -13,6 +13,7 @@
 
 struct data
 {
+    virtual ~data() {}; // silence compiler warnings
     virtual int id() const
     {
         return 42;