diff --git a/completion/available/docker-compose.completion.bash b/completion/available/docker-compose.completion.bash
old mode 100644
new mode 100755
index bf2c13fb..1102f5d9
--- a/completion/available/docker-compose.completion.bash
+++ b/completion/available/docker-compose.completion.bash
@@ -676,7 +676,7 @@ _docker_compose() {
 	done
 
 	local completions_func=_docker_compose_${command//-/_}
-	declare -F $completions_func >/dev/null && $completions_func
+	_is_function $completions_func && $completions_func
 
 	eval "$previous_extglob_setting"
 	return 0