1 files changed, 2 insertions, 1 deletions

diff --git a/include/libbb.h b/include/libbb.h
index df8b0ecdb..c6c2be244 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -237,7 +237,8 @@ extern int recursive_action(const char *fileName, unsigned flags,
         int (*dirAction) (const char *fileName, struct stat* statbuf, void* userData, int depth),
         void* userData, unsigned depth);
 extern int device_open(const char *device, int mode);
-extern int getpty(char *line, int size);
+enum { GETPTY_BUFSIZE = 16 }; /* more than enough for "/dev/ttyXXX" */
+extern int getpty(char *line);
 extern int get_console_fd(void);
 extern char *find_block_device(const char *path);
 /* bb_copyfd_XX print read/write errors and return -1 if they occur */