diff --git a/config.php.default b/config.php.default
index 2da0514e0d..85c5de25b0 100755
--- a/config.php.default
+++ b/config.php.default
@@ -46,6 +46,8 @@ $config['auth_mechanism'] = "mysql"; # default, other options: ldap, http-auth
 $config['poller-wrapper']['alerter'] = FALSE;
 # Uncomment the next line to disable daily updates
 #$config['update'] = 0;
+$config['rrd_purge'] = 90;
+// Number in days of how long to keep old rrd files.
 
 # Uncomment to submit callback stats via proxy
 #$config['callback_proxy'] = "hostname:port";
diff --git a/daily.php b/daily.php
index 4184b20cff..d8579761f7 100644
--- a/daily.php
+++ b/daily.php
@@ -31,6 +31,14 @@ if ($options['f'] === 'update') {
     exit(0);
 }
 
+if ($options['f'] === 'rrd_purge') {
+    if (is_numeric($config['rrd_purge'])) {
+        $cmd = "find ".$config['rrd_dir']." -mtime +".$config['rrd_purge']." -exec rm -Rf {} \;";
+        $purge = `$cmd`;
+        echo 'purged old rrd files';
+    }
+}
+
 if ($options['f'] === 'syslog') {
     if (is_numeric($config['syslog_purge'])) {
         $rows = dbFetchRow('SELECT MIN(seq) FROM syslog');
diff --git a/daily.sh b/daily.sh
index de298c7b9c..a3bb7f0185 100755
--- a/daily.sh
+++ b/daily.sh
@@ -76,7 +76,7 @@ else
             status_run 'Fetching notifications' "$0 notifications"
         ;;
         cleanup)
-            # DB-Cleanups
+            # Cleanups
             php daily.php -f syslog
             php daily.php -f eventlog
             php daily.php -f authlog
@@ -86,6 +86,7 @@ else
             php daily.php -f purgeusers
             php daily.php -f bill_data
             php daily.php -f alert_log
+            php daily.php -f rrd_purge
         ;;
         submodules)
             # Init+Update our submodules