diff --git a/src/async_io_epoll.cpp b/src/async_io_epoll.cpp
index 7ed9493..df60584 100644
--- a/src/async_io_epoll.cpp
+++ b/src/async_io_epoll.cpp
@@ -8,6 +8,7 @@
 #include <array>
 #include <atomic>
 #include <cerrno>
+#include <climits>
 #include <condition_variable>
 #include <cstdint>
 #include <deque>
diff --git a/src/async_io_kqueue.cpp b/src/async_io_kqueue.cpp
index 95bc90e..123020d 100644
--- a/src/async_io_kqueue.cpp
+++ b/src/async_io_kqueue.cpp
@@ -8,6 +8,7 @@
 #include <array>
 #include <atomic>
 #include <cerrno>
+#include <climits>
 #include <condition_variable>
 #include <cstdint>
 #include <cstring>
diff --git a/src/files.cpp b/src/files.cpp
index 31047b9..c2f3d01 100644
--- a/src/files.cpp
+++ b/src/files.cpp
@@ -6,6 +6,7 @@
 
 #include <algorithm>
 #include <cerrno>
+#include <climits>
 #include <csignal>
 #include <cstddef>
 #include <cstdio>