diff --git a/man/man5/TZ.5 b/man/man5/TZ.5
index 40bd7db9f..dfe3eb696 100644
--- a/man/man5/TZ.5
+++ b/man/man5/TZ.5
@@ -127,7 +127,7 @@ Sunday in October at 2 AM and ends on the third Sunday in March at 3 AM:
 .BR readclock (8),
 .BR date (1).
 .SH BUGS
-You may have noticed that many fields are optional.  Do no omit them,
+You may have noticed that many fields are optional.  Do not omit them,
 because the defaults are bogus.  If you need daylight saving then fully
 specify the changeovers.
 .PP