diff --git a/openjpa-lib/src/main/java/org/apache/openjpa/lib/conf/ConfigurationImpl.java b/openjpa-lib/src/main/java/org/apache/openjpa/lib/conf/ConfigurationImpl.java
index bbf651e8b..3fb79fac5 100644
--- a/openjpa-lib/src/main/java/org/apache/openjpa/lib/conf/ConfigurationImpl.java
+++ b/openjpa-lib/src/main/java/org/apache/openjpa/lib/conf/ConfigurationImpl.java
@@ -217,7 +217,6 @@ public class ConfigurationImpl
     }
 
     public void setLog(String log) {
-        assertNotReadOnly();
         logFactoryPlugin.setString(log);
     }
 
diff --git a/openjpa-lib/src/main/java/org/apache/openjpa/lib/conf/PluginValue.java b/openjpa-lib/src/main/java/org/apache/openjpa/lib/conf/PluginValue.java
index 362072abd..e15740f51 100644
--- a/openjpa-lib/src/main/java/org/apache/openjpa/lib/conf/PluginValue.java
+++ b/openjpa-lib/src/main/java/org/apache/openjpa/lib/conf/PluginValue.java
@@ -20,6 +20,7 @@ package org.apache.openjpa.lib.conf;
 
 import org.apache.commons.lang.StringUtils;
 import org.apache.openjpa.lib.log.Log;
+import org.apache.openjpa.lib.log.LogFactory;
 import org.apache.openjpa.lib.util.Localizer;
 import org.apache.openjpa.lib.util.ParseException;
 
@@ -104,7 +105,8 @@ public class PluginValue extends ObjectValue {
         
         // ensure plugin value is compatible with plugin type
         if (obj != null && !type.isAssignableFrom(obj.getClass())) {
-            Log log = (conf == null) ? null : conf.getConfigurationLog();
+            Log log = (conf == null || type.equals(LogFactory.class)) 
+                      ? null : conf.getConfigurationLog();
             String msg = getIncompatiblePluginMessage(obj, type);
             if (log != null && log.isErrorEnabled()) {
             	log.error(msg);