diff --git a/base1432.c b/base1432.c
index 81eba1a..4256bc2 100644
--- a/base1432.c
+++ b/base1432.c
@@ -1,6 +1,7 @@
 // base1432.c
 // fumiama 20220319
 #include <stdio.h>
+#include <stdint.h>
 #include <stdlib.h>
 #ifdef __linux__
 #  include <endian.h>
diff --git a/base1464.c b/base1464.c
index 8be83db..e693ce4 100644
--- a/base1464.c
+++ b/base1464.c
@@ -1,6 +1,7 @@
 // base1464.c
 // fumiama 20211029
 #include <stdio.h>
+#include <stdint.h>
 #include <stdlib.h>
 #ifdef __linux__
 #  include <endian.h>