Bride of the Splint Cleanup. All regression tests pass.

1 files changed, 1 insertions, 1 deletions

diff --git a/serial.c b/serial.c
index 5c3004db..adcdb521 100644
--- a/serial.c
+++ b/serial.c
@@ -49,7 +49,7 @@ void cfmakeraw(struct termios *termios_p)
 }
 #endif /* defined(__CYGWIN__) */
 
-speed_t gpsd_get_speed(struct termios* ttyctl)
+speed_t gpsd_get_speed(const struct termios* ttyctl)
 {
     speed_t code = cfgetospeed(ttyctl);
     switch (code) {