diff --git a/server.c b/server.c
index 434d0a3..2d51dc7 100644
--- a/server.c
+++ b/server.c
@@ -1,5 +1,6 @@
 #include <arpa/inet.h>
 #include <errno.h>
+#include <fcntl.h>
 #include <netdb.h>
 #include <netinet/in.h>
 #include <signal.h>