diff --git jackrabbit-api/src/main/java/org/apache/jackrabbit/api/security/user/AuthorizableTypeException.java jackrabbit-api/src/main/java/org/apache/jackrabbit/api/security/user/AuthorizableTypeException.java
new file mode 100644
index 0000000..3a963ed
--- /dev/null
+++ jackrabbit-api/src/main/java/org/apache/jackrabbit/api/security/user/AuthorizableTypeException.java
@@ -0,0 +1,35 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.jackrabbit.api.security.user;
+
+import javax.jcr.RepositoryException;
+
+/**
+ * The {@code AuthorizableTypeException} signals an {@link Authorizable} type mismatch.
+ */
+public class AuthorizableTypeException extends RepositoryException {
+
+    /**
+     * Serial version UID.
+     */
+    private static final long serialVersionUID = -7630050662371536149L;
+
+    public AuthorizableTypeException(String msg) {
+        super(msg);
+    }
+
+}