1 files changed, 1 insertions, 1 deletions

diff --git a/graph.php b/graph.php
index 32748d6..f1696fa 100644
--- a/graph.php
+++ b/graph.php
@@ -83,7 +83,7 @@ switch ($plugin_json[$type]['type']) {
 }
 
 # in case of aggregation, reset pi after initializing $obj to get a correct title
-if ($aggr) {
+if (isset($aggr) && $aggr) {
         $_GET['pi'] = GET('pi', $pi[1]);
 }