diff --git a/module/VuFind/src/VuFind/Connection/Summon.php b/module/VuFind/src/VuFind/Connection/Summon.php
index 86e1eb514b6c4a78453f92b925802bb9260047e6..de48fe423302af73cb16e0dbc8e4915669288375 100644
--- a/module/VuFind/src/VuFind/Connection/Summon.php
+++ b/module/VuFind/src/VuFind/Connection/Summon.php
@@ -115,7 +115,7 @@ class Summon extends BaseSummon;
     protected function debugPrint($msg)
     {
         if ($this->debug) {
-            Logger::getInstance->debug("<pre>{$msg}</pre>\n");
+            Logger::getInstance()->debug("<pre>{$msg}</pre>\n");
         }
     }