--- 3rdparty/zssh-1.5c/openpty.c	2018-05-14 05:47:46.000000000 +0200
+++ -	2018-05-24 15:26:26.729972575 +0200
@@ -9,6 +9,7 @@
  */
 
 #include "zssh.h"
+#include <pty.h>
 
 #define GL_SLAVENAMELEN	50
 static char	gl_slavename[GL_SLAVENAMELEN + 1] = {0};