diff --git a/cd.sh b/cd.sh
index f15b989..5bec963 100644
--- a/cd.sh
+++ b/cd.sh
@@ -597,10 +597,11 @@ ${CD_PYTHON_PACKAGES}/${CD_GIT_CHILD}"
 # functions
 
 cd_cat () {
-    if [ -f "${1}" ] ; then
-        cd_open "${1}"
-        cat "${1}" || exit
-        cd_shut "${1}"
+    cd_cat__file="${1}"
+    if [ "${cd_cat__file}" ] ; then
+        cd_open "${cd_cat__file}"
+        cat "${cd_cat__file}" || exit
+        cd_shut "${cd_cat__file}"
     fi
 }