diff --git a/man3/termios.3 b/man3/termios.3
index aafdfb053..e826ba04f 100644
--- a/man3/termios.3
+++ b/man3/termios.3
@@ -204,7 +204,8 @@ Values are \fBNL0\fP and \fBNL1\fP.
 .B _BSD_SOURCE
 or
 .B _SVID_SOURCE
-or _XOPEN_SOURCE]
+or
+.BR _XOPEN_SOURCE ]
 .TP
 .B CRDLY
 Carriage return delay mask.
@@ -213,7 +214,8 @@ Values are \fBCR0\fP, \fBCR1\fP, \fBCR2\fP, or \fBCR3\fP.
 .B _BSD_SOURCE
 or
 .B _SVID_SOURCE
-or _XOPEN_SOURCE]
+or
+.BR _XOPEN_SOURCE ]
 .TP
 .B TABDLY
 Horizontal tab delay mask.
@@ -224,7 +226,8 @@ A value of TAB3, that is, XTABS, expands tabs to spaces
 .B _BSD_SOURCE
 or
 .B _SVID_SOURCE
-or _XOPEN_SOURCE]
+or
+.BR _XOPEN_SOURCE ]
 .TP
 .B BSDLY
 Backspace delay mask.
@@ -234,7 +237,8 @@ Values are \fBBS0\fP or \fBBS1\fP.
 .B _BSD_SOURCE
 or
 .B _SVID_SOURCE
-or _XOPEN_SOURCE]
+or
+.BR _XOPEN_SOURCE ]
 .TP
 .B VTDLY
 Vertical tab delay mask.
@@ -247,7 +251,8 @@ Values are \fBFF0\fP or \fBFF1\fP.
 .B _BSD_SOURCE
 or
 .B _SVID_SOURCE
-or _XOPEN_SOURCE]
+or
+.BR _XOPEN_SOURCE ]
 .PP
 \fIc_cflag\fP flag constants:
 .TP
@@ -255,13 +260,15 @@ or _XOPEN_SOURCE]
 (not in POSIX) Baud speed mask (4+1 bits).
 [requires
 .B _BSD_SOURCE
-or _SVID_SOURCE]
+or
+.BR _SVID_SOURCE ]
 .TP
 .B CBAUDEX
 (not in POSIX) Extra baud speed mask (1 bit), included in CBAUD.
 [requires
 .B _BSD_SOURCE
-or _SVID_SOURCE]
+or
+.BR _SVID_SOURCE ]
 .sp
 (POSIX says that the baud speed is stored in the
 .I termios
@@ -310,7 +317,8 @@ The values for the CIBAUD bits are
 the same as the values for the CBAUD bits, shifted left IBSHIFT bits.
 [requires
 .B _BSD_SOURCE
-or _SVID_SOURCE]
+or
+.BR _SVID_SOURCE ]
 (Not implemented on Linux.)
 .TP
 .B CMSPAR
@@ -323,13 +331,15 @@ is set, the parity bit is always 1; if
 is not set, then the parity bit is always 0).
 [requires
 .B _BSD_SOURCE
-or _SVID_SOURCE]
+or
+.BR _SVID_SOURCE ]
 .TP
 .B CRTSCTS
 (not in POSIX) Enable RTS/CTS (hardware) flow control.
 [requires
 .B _BSD_SOURCE
-or _SVID_SOURCE]
+or
+.BR _SVID_SOURCE ]
 .PP
 \fIc_lflag\fP flag constants:
 .TP
@@ -372,21 +382,24 @@ For example, character
 0x08 (BS) is echoed as ^H.
 [requires
 .B _BSD_SOURCE
-or _SVID_SOURCE]
+or
+.BR _SVID_SOURCE ]
 .TP
 .B ECHOPRT
 (not in POSIX) If \fBICANON\fP and \fBIECHO\fP are also set, characters
 are printed as they are being erased.
 [requires
 .B _BSD_SOURCE
-or _SVID_SOURCE]
+or
+.BR _SVID_SOURCE ]
 .TP
 .B ECHOKE
 (not in POSIX) If \fBICANON\fP is also set, KILL is echoed by erasing
 each character on the line, as specified by \fBECHOE\fP and \fBECHOPRT\fP.
 [requires
 .B _BSD_SOURCE
-or _SVID_SOURCE]
+or
+.BR _SVID_SOURCE ]
 .TP
 .B DEFECHO
 (not in POSIX) Echo only when a process is reading.
@@ -399,7 +412,8 @@ This flag is toggled by typing
 the DISCARD character.
 [requires
 .B _BSD_SOURCE
-or _SVID_SOURCE]
+or
+.BR _SVID_SOURCE ]
 .TP
 .B NOFLSH
 Disable flushing the input and output queues when generating the
@@ -423,7 +437,8 @@ the next character is read.
 (\fBbash\fP handles typeahead this way.)
 [requires
 .B _BSD_SOURCE
-or _SVID_SOURCE]
+or
+.BR _SVID_SOURCE ]
 .TP
 .B IEXTEN
 Enable implementation-defined input processing.