diff --git a/module/VuFind/src/VuFind/ILS/Driver/MultiBackend.php b/module/VuFind/src/VuFind/ILS/Driver/MultiBackend.php
index 76f6b382896a50bbb54244ecb10e01d83c8c45b9..c2bb4ab6d477168c216c2dc1e0056b8f79efa994 100644
--- a/module/VuFind/src/VuFind/ILS/Driver/MultiBackend.php
+++ b/module/VuFind/src/VuFind/ILS/Driver/MultiBackend.php
@@ -1323,7 +1323,7 @@ class MultiBackend extends AbstractBase implements \Zend\Log\LoggerAwareInterfac
      *
      * @param string $id The id to be split
      *
-     * @return string  Source
+     * @return string Source
      */
     protected function getSource($id)
     {
@@ -1332,7 +1332,6 @@ class MultiBackend extends AbstractBase implements \Zend\Log\LoggerAwareInterfac
             return substr($id, 0, $pos);
         }
 
-        $this->debug("Could not find source id in '$id'");
         return '';
     }
 
@@ -1365,9 +1364,6 @@ class MultiBackend extends AbstractBase implements \Zend\Log\LoggerAwareInterfac
                 return $source;
             }
         }
-        $this->debug(
-            'Could not find source id in params: ' . print_r($params, true)
-        );
         return '';
     }