diff --git a/include/fc/exception/exception.hpp b/include/fc/exception/exception.hpp
index 64d343c..2d2cfc6 100644
--- a/include/fc/exception/exception.hpp
+++ b/include/fc/exception/exception.hpp
@@ -183,6 +183,7 @@ namespace fc
            static exception_builder<T> builder;
            auto itr = _registered_exceptions.find( T::code_value );
            assert( itr == _registered_exceptions.end() );
+           (void)itr; // in release builds this hides warnings
            _registered_exceptions[T::code_value] = &builder;
         }