diff --git a/contrib/init/upstart/docker.conf b/contrib/init/upstart/docker.conf
index 907a536c9c..e27d77e145 100644
--- a/contrib/init/upstart/docker.conf
+++ b/contrib/init/upstart/docker.conf
@@ -37,5 +37,5 @@ script
 	if [ -f /etc/default/$UPSTART_JOB ]; then
 		. /etc/default/$UPSTART_JOB
 	fi
-	"$DOCKER" -d $DOCKER_OPTS
+	exec "$DOCKER" -d $DOCKER_OPTS
 end script