diff --git a/src/_docker-machine b/src/_docker-machine
index cf1cfbe..76a2d82 100644
--- a/src/_docker-machine
+++ b/src/_docker-machine
@@ -18,7 +18,7 @@
 # helper function for completing available machines
 __machines() {
   declare -a machines_cmd
-  machines_cmd=($(docker-machine ls|tail +2|awk '{print $1":"$3"("$4")"}'))
+  machines_cmd=($(docker-machine ls|tail -n +2|awk '{print $1":"$3"("$4")"}'))
   _describe 'machines' machines_cmd
 }