diff --git a/completion/available/kontena.completion.bash b/completion/available/kontena.completion.bash
index a1d24b3c..c60803fe 100644
--- a/completion/available/kontena.completion.bash
+++ b/completion/available/kontena.completion.bash
@@ -1 +1 @@
-which kontena > /dev/null && . "$( kontena whoami --bash-completion-path )"
+if _command_exists kontena; then source "$( kontena whoami --bash-completion-path )"; fi