diff --git a/tools/deployment/developer/common/170-setup-gateway.sh b/tools/deployment/developer/common/170-setup-gateway.sh
index 270cb2c143..b626843556 100755
--- a/tools/deployment/developer/common/170-setup-gateway.sh
+++ b/tools/deployment/developer/common/170-setup-gateway.sh
@@ -16,7 +16,7 @@ set -xe
 # Assign IP address to br-ex
 : ${OSH_EXT_SUBNET:="172.24.4.0/24"}
 : ${OSH_BR_EX_ADDR:="172.24.4.1/24"}
-sudo ip addr add ${OSH_BR_EX_ADDR} dev br-ex
+sudo ip addr replace ${OSH_BR_EX_ADDR} dev br-ex
 sudo ip link set br-ex up
 
 : ${DNSMASQ_IMAGE:=docker.io/openstackhelm/neutron:xena-ubuntu_focal}