diff --git a/scripts/bootstrap-aio.sh b/scripts/bootstrap-aio.sh
index e5e76b3545..9ee546bb74 100755
--- a/scripts/bootstrap-aio.sh
+++ b/scripts/bootstrap-aio.sh
@@ -23,7 +23,7 @@ export ADMIN_PASSWORD=${ADMIN_PASSWORD:-"secrete"}
 export SERVICE_REGION=${SERVICE_REGION:-"RegionOne"}
 export DEPLOY_SWIFT=${DEPLOY_SWIFT:-"yes"}
 export GET_PIP_URL=${GET_PIP_URL:-"https://bootstrap.pypa.io/get-pip.py"}
-export PUBLIC_INTERFACE=${PUBLIC_INTERFACE:-"eth0"}
+export PUBLIC_INTERFACE=${PUBLIC_INTERFACE:-$(ip route show | awk '/default/ { print $NF }')}
 export PUBLIC_ADDRESS=${PUBLIC_ADDRESS:-$(ip -o -4 addr show dev ${PUBLIC_INTERFACE} | awk -F '[ /]+' '/global/ {print $4}')}
 export NOVA_VIRT_TYPE=${NOVA_VIRT_TYPE:-"qemu"}
 export TEMPEST_FLAT_CIDR=${TEMPEST_FLAT_CIDR:-"172.29.248.0/22"}