diff --git a/include/kabufuda/Util.hpp b/include/kabufuda/Util.hpp
index eb8be8d..298ff4a 100644
--- a/include/kabufuda/Util.hpp
+++ b/include/kabufuda/Util.hpp
@@ -10,6 +10,7 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <sys/statvfs.h>
+#include <errno.h>
 #else
 #ifndef WIN32_LEAN_AND_MEAN
 #define WIN32_LEAN_AND_MEAN 1