diff --git a/enter_chroot.sh b/enter_chroot.sh
index 606e02fbb5..d5a7ec2de7 100755
--- a/enter_chroot.sh
+++ b/enter_chroot.sh
@@ -98,7 +98,7 @@ function setup_env {
     MOUNTED_PATH="$(readlink -f "${FLAGS_chroot}${INNER_CHROME_ROOT}")"
     if [ -z "$(mount | grep -F "on $MOUNTED_PATH")" ]
     then
-      CHROME_ROOT="$(readlink -f "$FLAGS_chrome_root")"
+      ! CHROME_ROOT="$(readlink -f "$FLAGS_chrome_root")"
       if [ -z "$CHROME_ROOT" ]; then
         ! CHROME_ROOT="$(cat "${FLAGS_chroot}${CHROME_ROOT_CONFIG}" \
           2>/dev/null)"