diff --git a/library/Icinga/Authentication/User/DbUserBackend.php b/library/Icinga/Authentication/User/DbUserBackend.php
index 35a0c3cc6..bc84c7b74 100644
--- a/library/Icinga/Authentication/User/DbUserBackend.php
+++ b/library/Icinga/Authentication/User/DbUserBackend.php
@@ -186,8 +186,9 @@ class DbUserBackend extends DbRepository implements UserBackendInterface, Inspec
 
         $query = $this->ds->select()
             ->from($this->prependTablePrefix('user'), $columns)
-            ->where('name', $username)
+            ->where(($this->ds->getDbType() === 'mysql' ? 'BINARY ' : '') . 'name', $username)
             ->where('active', true);
+
         $statement = $this->ds->getDbAdapter()->prepare($query->getSelectQuery());
         $statement->execute();
         $statement->bindColumn(1, $lob, PDO::PARAM_LOB);