diff --git a/cd.sh b/cd.sh
index 80e40d9..13141fd 100644
--- a/cd.sh
+++ b/cd.sh
@@ -442,7 +442,7 @@ cd_list_working_directory () {
 }
 
 cd_set_https_verification_off () {
-    if [ "${CD_CA}" -o "${CD_PM}" = "${CD_PM_APT}" ] ; then
+    if [ "${CD_CA}" ] || [ "${CD_PM}" = "${CD_PM_APT}" ] ; then
         cd_step "Set HTTPS verification off"
         cd_mkdir "$(dirname "${CD_PM_HTTPS_PATH}")"
         cd_write "${CD_PM_HTTPS_PATH}" "${CD_PM_HTTPS_TEXT}"