diff --git a/doc/sun.1 b/doc/sun.1
index 66bbb81..e64dba6 100644
--- a/doc/sun.1
+++ b/doc/sun.1
@@ -28,11 +28,11 @@ Please note that a combination of \fB\-\-lat\fR, \fB\-\-lon\fR or \fB\-\-query\f
 \fB\-t\fR, \fB\-\-twilight\fR=\fITWILIGHT\fP
 use special twilight.
 
-\fBcivil\fR: -6 degrees
+\fBcivil\fR: \-6 degrees
 
-\fBnautic\fR: -12 degrees
+\fBnautic\fR: \-12 degrees
 
-\fBastro\fR: -18 degrees
+\fBastro\fR: \-18 degrees
 
 .TP
 \fB\-d\fR, \fB\-\-date\fR=\f%Y-%m-%d\fP