diff --git a/docker/podman-docker.sh b/docker/podman-docker.sh
index 2ce2f7da3b..fc128f34c7 100644
--- a/docker/podman-docker.sh
+++ b/docker/podman-docker.sh
@@ -1,7 +1,7 @@
 # DOCKER_HOST initialization
 
 if [ -z "${DOCKER_HOST-}" ]; then
-    if [ $(id -u) -eq 0 ]; then
+    if [ "$(id -u)" -eq 0 ]; then
 	export DOCKER_HOST=unix:///run/podman/podman.sock
     else
 	if [ -n "${XDG_RUNTIME_DIR-}" ]; then