diff --git a/module/VuFind/src/VuFind/ILS/Driver/Voyager.php b/module/VuFind/src/VuFind/ILS/Driver/Voyager.php
index 3ed756f7f5ef7d5b10f37365291e4ccb85c2e094..4f915b741354db7099eb4ccf36ad8759889c4deb 100644
--- a/module/VuFind/src/VuFind/ILS/Driver/Voyager.php
+++ b/module/VuFind/src/VuFind/ILS/Driver/Voyager.php
@@ -172,7 +172,7 @@ class Voyager extends AbstractBase
                    ')';
             try {
                 $this->lazyDb = new Oci8(
-                    "oci:dbname=$tns;charset=US_ASCII",
+                    "oci:dbname=$tns;charset=US7ASCII",
                     $this->config['Catalog']['user'],
                     $this->config['Catalog']['password']
                 );