diff --git a/dokku b/dokku
index b26f6c799..05ae39621 100755
--- a/dokku
+++ b/dokku
@@ -9,7 +9,7 @@ export DOKKU_ROOT=${DOKKU_ROOT:=~dokku}
 
 export DOKKU_DISTRO
 # shellcheck disable=SC1091
-DOKKU_DISTRO=$(. /etc/os-release && echo "$ID")
+DOKKU_DISTRO=$(. /etc/os-release > /dev/null 2>&1 || true ; echo "$ID")
 
 export DOKKU_IMAGE=${DOKKU_IMAGE:="gliderlabs/herokuish"}
 export DOKKU_LIB_ROOT=${DOKKU_LIB_PATH:="/var/lib/dokku"}