diff --git a/bins/icb-irc-tunnel.nix b/bins/icb-irc-tunnel.nix
index 9056403..22dac43 100644
--- a/bins/icb-irc-tunnel.nix
+++ b/bins/icb-irc-tunnel.nix
@@ -8,9 +8,9 @@
   ${icbirc}/bin/icbirc -l 127.0.0.1 -s localhost -p 6645
 
   tname="IRC"
-  if !tmux ls | grep -q "^${tname}:"; then
-    tmux -2 new-session -d -s "${tname}" 'weechat'
-    tmux -s "${tname}" splitw -dv -b -h -l 30% 'ssh anonicb@slackers.openbsd.org'
+  if !tmux ls | grep -q "^''${tname}:"; then
+    tmux -2 new-session -d -s "''${tname}" 'weechat'
+    tmux -s "''${tname}" splitw -dv -b -h -l 30% 'ssh anonicb@slackers.openbsd.org'
   fi
 
   ${pkgs.openssh}/bin/ssh -NTL 7326:localhost:7326 \