diff --git a/cli/mkpty.c b/cli/_pty.c
similarity index 99%
rename from cli/mkpty.c
rename to cli/_pty.c
index dd845b4..60509e8 100644
--- a/cli/mkpty.c
+++ b/cli/_pty.c
@@ -17,7 +17,7 @@
 #include <asm/termbits.h>  /* TIOC* constants */
 #include <sys/ioctl.h>
 
-#include "mkpty.h"
+#include "_pty.h"
 
 /* Allocate PTY master and slave file descriptors.
  * errno will have been set if newpty() fails.
diff --git a/cli/mkpty.h b/cli/_pty.h
similarity index 100%
rename from cli/mkpty.h
rename to cli/_pty.h