diff --git a/tools/addon/pihole-exporter.sh b/tools/addon/pihole-exporter.sh
index bf60bc0cc..5547f35c5 100644
--- a/tools/addon/pihole-exporter.sh
+++ b/tools/addon/pihole-exporter.sh
@@ -101,7 +101,7 @@ msg_info "Creating configuration"
 cat <<EOF >"$CONFIG_PATH"
 # https://github.com/eko/pihole-exporter/?tab=readme-ov-file#available-cli-options
 PIHOLE_PASSWORD="${pihole_PASSWORD}"
-PIHOLE_hostname="${pihole_HOSTNAME}"
+PIHOLE_HOSTNAME="${pihole_HOSTNAME}"
 SKIP_TLS_VERIFICATION="${pihole_SKIP_TLS}"
 EOF
 msg_ok "Created configuration"