diff --git a/src/main/include/log4cxx/helpers/widelife.h b/src/main/include/log4cxx/helpers/widelife.h index 761971666..34e160756 100644 --- a/src/main/include/log4cxx/helpers/widelife.h +++ b/src/main/include/log4cxx/helpers/widelife.h @@ -19,6 +19,9 @@ #define _LOG4CXX_HELPERS_WIDELIFE_H #include +#if defined(__cpp_concepts) && __cpp_concepts >= 201500 +#include +#endif namespace log4cxx {