diff --git a/extensions/guacamole-auth-mysql/src/main/java/net/sourceforge/guacamole/net/auth/mysql/UserDirectory.java b/extensions/guacamole-auth-mysql/src/main/java/net/sourceforge/guacamole/net/auth/mysql/UserDirectory.java
index 05f8d933a..2262e37ed 100644
--- a/extensions/guacamole-auth-mysql/src/main/java/net/sourceforge/guacamole/net/auth/mysql/UserDirectory.java
+++ b/extensions/guacamole-auth-mysql/src/main/java/net/sourceforge/guacamole/net/auth/mysql/UserDirectory.java
@@ -703,7 +703,7 @@ public class UserDirectory implements Directory<String, net.sourceforge.guacamol
         systemPermissionDAO.deleteByExample(systemPermissionExample);
 
         // Delete all permissions that refer to this user
-        userPermissionExample.createCriteria();
+        userPermissionExample.clear();
         userPermissionExample.createCriteria().andAffected_user_idEqualTo(user.getUserID());
         userPermissionDAO.deleteByExample(userPermissionExample);