diff --git a/modules/clan/phonebox/default.nix b/modules/clan/phonebox/default.nix
index 4d0a954..19e3aab 100644
--- a/modules/clan/phonebox/default.nix
+++ b/modules/clan/phonebox/default.nix
@@ -261,7 +261,7 @@
                       same => n,ReceiveFAX(/run/asterisk/test.tiff)
                       same => n,Set(FAXFILE=/run/asterisk/test.tiff)
                       same => n,Hangup()
-                      same => n,Dial(PJSIP/''${CALLERID (num)},30,U(send-fax-sub))
+                      same => n,Dial(PJSIP/''${CALLERID(num)},30,U(send-fax-sub))
                       same => n,Hangup()
 
                       [send-fax-sub]