diff --git a/include/boost/type_traits/is_complete.hpp b/include/boost/type_traits/is_complete.hpp
index fe5e338..47aec34 100644
--- a/include/boost/type_traits/is_complete.hpp
+++ b/include/boost/type_traits/is_complete.hpp
@@ -12,6 +12,7 @@
 #include <boost/type_traits/integral_constant.hpp>
 #include <boost/type_traits/remove_reference.hpp>
 #include <boost/type_traits/is_function.hpp>
+#include <boost/type_traits/detail/yes_no_type.hpp>
 #include <boost/config/workaround.hpp>
 
 /*