1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/tty.h b/include/linux/tty.h
index 568369a86306..71c7e9c96b23 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -23,7 +23,7 @@
  */
 #define NR_UNIX98_PTY_DEFAULT   4096      /* Default maximum for Unix98 ptys */
 #define NR_UNIX98_PTY_MAX       (1 << MINORBITS) /* Absolute limit */
-#define NR_LDISCS               20
+#define NR_LDISCS               21
 
 /* line disciplines */
 #define N_TTY           0
@@ -46,8 +46,8 @@
 #define N_GIGASET_M101  16      /* Siemens Gigaset M101 serial DECT adapter */
 #define N_SLCAN         17      /* Serial / USB serial CAN Adaptors */
 #define N_PPS           18      /* Pulse per Second */
-
 #define N_V253          19      /* Codec control over voice modem */
+#define N_CAIF          20      /* CAIF protocol for talking to modems */
 
 /*
  * This character is the same as _POSIX_VDISABLE: it cannot be used as