diff --git a/module/VuFind/src/VuFind/Search/ProQuestFSG/Results.php b/module/VuFind/src/VuFind/Search/ProQuestFSG/Results.php
index d3c675dd4ec..88e6a37df49 100644
--- a/module/VuFind/src/VuFind/Search/ProQuestFSG/Results.php
+++ b/module/VuFind/src/VuFind/Search/ProQuestFSG/Results.php
@@ -31,6 +31,8 @@
 
 use VuFindSearch\Command\SearchCommand;
 
+use function strlen;
+
 /**
  * ProQuest Federated Search Gateway Search Parameters
  *