diff --git a/enter_chroot.sh b/enter_chroot.sh
index 9d2117cd6b..a430482355 100755
--- a/enter_chroot.sh
+++ b/enter_chroot.sh
@@ -264,7 +264,7 @@ CHROOT_PASSTHRU="CHROMEOS_REVISION=$REVISION BUILDBOT_BUILD=$FLAGS_build_number
 # the source trunk for scripts that may need to print it (e.g.
 # build_image.sh).
 sudo chroot "$FLAGS_chroot" sudo -i -u $USER $CHROOT_PASSTHRU \
-  EXTERNAL_TRUNK_PATH="${FLAGS_trunk}" LANG=C "$@"
+  EXTERNAL_TRUNK_PATH="${FLAGS_trunk}" LANG=C -- "$@"
 
 # Remove trap and explicitly unmount
 trap - EXIT