diff --git a/linux_os.c b/linux_os.c
index 7d1c648..f99966a 100644
--- a/linux_os.c
+++ b/linux_os.c
@@ -1,6 +1,7 @@
 #include <sys/mman.h>
 #define _POSIX_C_SOURCE 200809L
 #include <sys/stat.h>
+#include <sys/select.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <time.h>