diff --git a/plugins/fbterm/fbterm.plugin.zsh b/plugins/fbterm/fbterm.plugin.zsh
index 4f045601..d60f0e27 100644
--- a/plugins/fbterm/fbterm.plugin.zsh
+++ b/plugins/fbterm/fbterm.plugin.zsh
@@ -1,6 +1,8 @@
 # start fbterm automatically in /dev/tty*
 
-if [[ $(tty|grep -o '/dev/tty') = /dev/tty ]] ; then
-	fbterm
-	exit
+if (( ${+commands[fbterm]} )); then
+	if [[ "$TTY" = /dev/tty* ]] ; then
+		fbterm
+		exit
+	fi
 fi