diff --git a/src/Tracy/Bar.php b/src/Tracy/Bar.php
index 824384d91..75daa98e0 100644
--- a/src/Tracy/Bar.php
+++ b/src/Tracy/Bar.php
@@ -107,7 +107,7 @@ public function render()
 				$panel['id'] .= '-' . $reqId;
 				$panels[] = $panel;
 			}
-			$liveData += $info['liveData'];
+			$liveData = array_merge($liveData, $info['liveData']);
 		}
 		$session = NULL;