diff --git a/32/base14.c b/32/base14.c
index 03ec61b..6644648 100644
--- a/32/base14.c
+++ b/32/base14.c
@@ -2,6 +2,7 @@
 //fumiama 20210408
 #include <stdio.h>
 #include <stdlib.h>
+#include <arpa/inet.h>
 #include "base14.h"
 
 //#define DEBUG
diff --git a/64/base14.c b/64/base14.c
index 0b433a2..96db434 100644
--- a/64/base14.c
+++ b/64/base14.c
@@ -2,6 +2,7 @@
 //fumiama 20211029
 #include <stdio.h>
 #include <stdlib.h>
+#include <arpa/inet.h>
 #include "base14.h"
 
 //#define DEBUG