diff --git a/include/internal/catch_type_traits.hpp b/include/internal/catch_type_traits.hpp
index 88615484..8edb1ecf 100644
--- a/include/internal/catch_type_traits.hpp
+++ b/include/internal/catch_type_traits.hpp
@@ -9,6 +9,8 @@
 #ifndef TWOBLUECUBES_CATCH_TYPE_TRAITS_HPP_INCLUDED
 #define TWOBLUECUBES_CATCH_TYPE_TRAITS_HPP_INCLUDED
 
+#include <type_traits>
+
 namespace Catch{
 
 #ifdef CATCH_CPP17_OR_GREATER