diff --git a/config/fish/functions/open-tmux.fish b/config/fish/functions/open-tmux.fish
index c0ee247..805ca88 100644
--- a/config/fish/functions/open-tmux.fish
+++ b/config/fish/functions/open-tmux.fish
@@ -2,9 +2,8 @@
 # Dependencies: tmux
 # Usage: open-tmux
 function open-tmux --wraps='tmux attach-session -t main || tmux new-session -s main' --description 'open tmux session'
-  if test -z "$SSH_TTY"
-    if not set -q TMUX
-      tmux attach-session -t main || tmux new-session -s main
-    end
+  # Check if not in an SSH session and not already in a tmux session
+  if test -z "$SSH_TTY"; and not set -q TMUX
+    command tmux attach-session -t main || command tmux new-session -s main
   end
 end