diff --git a/src/cxxopts.hpp b/src/cxxopts.hpp
index 4f4fe7b..146b0d6 100644
--- a/src/cxxopts.hpp
+++ b/src/cxxopts.hpp
@@ -500,7 +500,11 @@ namespace cxxopts
     const T&
     as() const
     {
+#ifdef CXXOPTS_NO_RTTI
+      return static_cast<const values::default_value<T>&>(*m_value).get();
+#else
       return dynamic_cast<const values::default_value<T>&>(*m_value).get();
+#endif
     }
 
     private: