diff --git a/test/stateless_test.cpp b/test/stateless_test.cpp
index 55a7f9c..e8dcc1f 100644
--- a/test/stateless_test.cpp
+++ b/test/stateless_test.cpp
@@ -24,6 +24,7 @@ struct stateless_integer_add {
   void* operator new(std::size_t, stateless_integer_add*)
   {
     throw std::runtime_error("Cannot allocate a stateless_integer_add");
+    return 0; // suppress warnings
   }
 
   void operator delete(void*, stateless_integer_add*) throw()