diff --git a/manpages/pihole.8 b/manpages/pihole.8
index bd7d0933..b3008563 100644
--- a/manpages/pihole.8
+++ b/manpages/pihole.8
@@ -35,7 +35,7 @@ pihole -g\fR
 .br
 \fBpihole\fR \fB-l\fR (\fBon|off|off noflush\fR)
 .br
-\fBpihole -up \fR[--checkonly]
+\fBpihole -up \fR[--check-only]
 .br
 \fBpihole -v\fR [-p|-a|-f] [-c|-l|-hash]
 .br