diff --git a/README.md b/README.md
index 163fdf9..90cdf90 100644
--- a/README.md
+++ b/README.md
@@ -42,14 +42,14 @@ Bash script ``cget.sh`` retrieves and caches HTTP resources on disk. A previousl
 
 ```Shell
 $ MD_LOCATION=http://md.incommon.org/InCommon/InCommon-metadata.xml
-$ CACHE_DIR=/tmp/http_cache
+$ export CACHE_DIR=/tmp/http_cache
 $ $BIN_DIR/cget.sh $MD_LOCATION > /dev/null
 $ echo $?
 0
 $ ls -1 $CACHE_DIR 
 885d2eedcad7d0355da5bb9e648833ec_content
 885d2eedcad7d0355da5bb9e648833ec_headers
-$ cat /tmp/http_cache/885d2eedcad7d0355da5bb9e648833ec_headers 
+$ cat $CACHE_DIR/885d2eedcad7d0355da5bb9e648833ec_headers 
 HTTP/1.1 200 OK
 Date: Mon, 17 Oct 2016 17:26:58 GMT
 Server: Apache