diff --git a/container-images/kolla/horizon/extend_start.sh b/container-images/kolla/horizon/extend_start.sh
index 66eb7c2c8..e4feae2d2 100644
--- a/container-images/kolla/horizon/extend_start.sh
+++ b/container-images/kolla/horizon/extend_start.sh
@@ -5,7 +5,8 @@ set -o errexit
 FORCE_GENERATE="${FORCE_GENERATE}"
 HASH_PATH=/var/lib/kolla/.settings.md5sum.txt
 MANAGE_PY="/usr/bin/python3 /usr/bin/manage.py"
-SITE_PACKAGES="/usr/lib/python${KOLLA_DISTRO_PYTHON_VERSION:-3}/site-packages"
+PYTHON_VERSION=$(python3 --version | awk '{print $2}' | awk -F'.' '{print $1"."$2}')
+SITE_PACKAGES="/usr/lib/python${PYTHON_VERSION}/site-packages"
 
 if [[ -f /etc/openstack-dashboard/custom_local_settings ]]; then
     CUSTOM_SETTINGS_FILE="${SITE_PACKAGES}/openstack_dashboard/local/custom_local_settings.py"