diff --git a/bin/fzf-tmux b/bin/fzf-tmux
index f882f8c..3be9b73 100755
--- a/bin/fzf-tmux
+++ b/bin/fzf-tmux
@@ -82,7 +82,7 @@ while [ $# -gt 0 ]; do
   shift
 done
 
-if [ -z "$TMUX_PANE" ]; then
+if [ -z "$TMUX" ]; then
   fzf "${args[@]}"
   exit $?
 fi