1 files changed, 2 insertions, 1 deletions
diff --git a/soxdial b/soxdial
index 4127951..a97add4 100755
--- a/soxdial
+++ b/soxdial
@@ -293,10 +293,11 @@ under the WTFPL: Do WTF you want with this.
 
 B<sox>(1)
 
-The Wikipedia articles on DTMF and the Blue Box:
+The Wikipedia articles on DTMF, dialtone, and the Blue Box:
 
   https://en.wikipedia.org/wiki/Dtmf
   https://en.wikipedia.org/wiki/Bluebox
+  https://en.wikipedia.org/wiki/Dialtone
 
 =cut