diff --git a/top/top.1 b/top/top.1
index 18aaed9d..d6b35cfd 100644
--- a/top/top.1
+++ b/top/top.1
@@ -299,7 +299,7 @@ names, and visa versa.
 \*(XC 'c' \*(CI for additional information.
 
 .TP 5
-\-\fBd\fR :\fI Delay-time\fR interval as:\ \ \fB-d ss.tt\fR (\fIsecs\fR.\fItenths\fR) \fR
+\-\fBd\fR :\fI Delay-time\fR interval as:\ \ \fB-d ss.t\fR (\fIsecs\fR.\fItenths\fR) \fR
 Specifies the delay between screen updates, and overrides the corresponding
 value in one's personal \*(CF or the startup default.
 Later this can be changed with the 'd' or 's' \*(CIs.