diff --git a/internal/catch_runner_impl.hpp b/internal/catch_runner_impl.hpp
index 2bd49431..2c2914eb 100644
--- a/internal/catch_runner_impl.hpp
+++ b/internal/catch_runner_impl.hpp
@@ -72,6 +72,9 @@ namespace Catch
     
     class Runner : public IResultListener
     {
+        Runner( const Runner& );
+        void operator =( const Runner& );
+        
     public:
         explicit Runner( const RunnerConfig& config )
         :   m_config( config ),