diff --git a/openjpa-kernel/src/main/java/org/apache/openjpa/conf/OpenJPAConfigurationImpl.java b/openjpa-kernel/src/main/java/org/apache/openjpa/conf/OpenJPAConfigurationImpl.java
index a4a98e19d..2b59f1818 100644
--- a/openjpa-kernel/src/main/java/org/apache/openjpa/conf/OpenJPAConfigurationImpl.java
+++ b/openjpa-kernel/src/main/java/org/apache/openjpa/conf/OpenJPAConfigurationImpl.java
@@ -1409,6 +1409,10 @@ public class OpenJPAConfigurationImpl
         runtimeUnenhancedClasses.set(mode);
     }
 
+    public void setRuntimeUnenhancedClasses(String mode) {
+        runtimeUnenhancedClasses.setString(mode);
+    }
+
     public String getCacheMarshallers() {
         return cacheMarshallerPlugins.getString();
     }
@@ -1421,10 +1425,6 @@ public class OpenJPAConfigurationImpl
         return cacheMarshallerPlugins.getInstancesAsMap();
     }
 
-    public void setRuntimeUnenhancedClasses(String mode) {
-        runtimeUnenhancedClasses.setString(mode);
-    }
-
     public void instantiateAll() {
         super.instantiateAll();
         getMetaDataRepositoryInstance();
diff --git a/openjpa-kernel/src/main/java/org/apache/openjpa/enhance/RuntimeUnenhancedClassesModes.java b/openjpa-kernel/src/main/java/org/apache/openjpa/enhance/RuntimeUnenhancedClassesModes.java
new file mode 100644
index 000000000..73a16b209
--- /dev/null
+++ b/openjpa-kernel/src/main/java/org/apache/openjpa/enhance/RuntimeUnenhancedClassesModes.java
@@ -0,0 +1,31 @@
+/*
+ * 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.openjpa.enhance;
+
+/**
+ * Possible values for the <code>openjpa.RuntimeUnenhancedClasses</code>
+ * configuration setting.
+ *
+ * @since 1.0.0
+ */
+public interface RuntimeUnenhancedClassesModes {
+    public final static int SUPPORTED = 0;
+    public final static int UNSUPPORTED = 1;
+    public final static int WARN = 2;
+}
\ No newline at end of file