diff --git a/cd.sh b/cd.sh
index e2b9b3b..2a5fe85 100644
--- a/cd.sh
+++ b/cd.sh
@@ -606,7 +606,7 @@ cd_mkdir () {
 
 cd_openssl () {
 local file="${1}"
-    if [ "${file}" ] ; then
+    if [ -f "${file}" ] ; then
         openssl x509 -noout -text -in "${file}" || exit
     fi
 }