diff --git a/release/release.sh b/release/release.sh
index 47b868dbcf9c..13ea5526e448 100755
--- a/release/release.sh
+++ b/release/release.sh
@@ -266,7 +266,7 @@ extra_chroot_setup() {
 	# Install git from ports or packages if the ports tree is
 	# available and VCSCMD is unset.
 	_gitcmd="$(which git)"
-	if [ -d ${CHROOTDIR}/usr/ports -a ! -z "${_gitcmd}" ]; then
+	if [ -d ${CHROOTDIR}/usr/ports -a -z "${_gitcmd}" ]; then
 		# Trick the ports 'run-autotools-fixup' target to do the right
 		# thing.
 		_OSVERSION=$(chroot ${CHROOTDIR} /usr/bin/uname -U)