diff --git a/docs/mm.1 b/docs/mm.1
index c971c00..ef0336a 100644
--- a/docs/mm.1
+++ b/docs/mm.1
@@ -46,7 +46,9 @@ writing to that particular output, and if there are more outputs specified,
 continues, eventually exiting unsuccessfully.
 
 When an error is encountered, diagnostic message is printed and the program
-exits with the appropriate sysexits.h(3) status.
+exits with the appropriate
+.BR sysexits.h (3)
+status.
 .\"
 .SH CAVEATS
 
@@ -54,9 +56,13 @@ Existing files are not truncated on ouput and are instead overwritten.
 .\"
 .SH RATIONALE
 
-The cat(1p) and tee(1p) programs specified in POSIX together provide similar
-functionality. The separation of the two sets of functionality into separate
-APIs seemed unncessary.
+The
+.BR cat (1p)
+and
+.BR tee (1p)
+programs specified in POSIX together provide similar functionality. The
+separation of the two sets of functionality into separate APIs seemed
+unncessary.
 .\"
 .SH COPYRIGHT