diff --git a/docs/highfrequency.md b/docs/highfrequency.md
index b72356a..bbd15b3 100644
--- a/docs/highfrequency.md
+++ b/docs/highfrequency.md
@@ -33,7 +33,7 @@ title: High frequency
                             :   Airspy  :                       :   FT-950  :-----------------------: Signalink :
                             :...........:                       :...........:                       :...........:
                 Hardware          |                                   |                                   |          Hardware
-                - - - - - - - - - | - - - - - - - - - - - - - - - - - | - -- - - - - - - - - - - - - - - -| - - - - - - - - -
+                - - - - - - - - - | - - - - - - - - - - - - - - - - - | - - - - - - - - - - - - - - - - - | - - - - - - - - -
                 Software          |                                   |                                   |          Software
                                   |                             ......:......           .............     |
                                   |                             :   Flrig   :-----+-----:  JS8Call  :-----+