diff --git a/contrib/backends/nntpchan-daemon/libnntpchan/event.cpp b/contrib/backends/nntpchan-daemon/libnntpchan/event.cpp
index 8d10fe7..a5d682c 100644
--- a/contrib/backends/nntpchan-daemon/libnntpchan/event.cpp
+++ b/contrib/backends/nntpchan-daemon/libnntpchan/event.cpp
@@ -1,7 +1,7 @@
 #include <fcntl.h>
 #include <cstdint>
 
-constexpr size_t ev_buffsz = 512;
+constexpr std::size_t ev_buffsz = 512;
 
 #ifdef __linux__
 #include "epoll.hpp"