diff --git a/man3/termios.3 b/man3/termios.3
index 857ada52c..28d4ba2bb 100644
--- a/man3/termios.3
+++ b/man3/termios.3
@@ -272,6 +272,13 @@ the same as the values for the CBAUD bits, shifted left IBSHIFT bits.
 [requires _BSD_SOURCE or _SVID_SOURCE]
 (Not implemented on Linux.)
 .TP
+.B CMSPAR
+Select stick parity (supported on certain serial devices): if
+.B PARODD 
+is set, the parity bit is always 1; if
+.B PARRODD 
+is not set, then the parity bit is always 0).
+.TP
 .B CRTSCTS
 (not in POSIX) Enable RTS/CTS (hardware) flow control.
 [requires _BSD_SOURCE or _SVID_SOURCE]