diff --git a/src/java/org/apache/commons/logging/impl/LogFactoryImpl.java b/src/java/org/apache/commons/logging/impl/LogFactoryImpl.java
index 796a5f6..6f6acb7 100644
--- a/src/java/org/apache/commons/logging/impl/LogFactoryImpl.java
+++ b/src/java/org/apache/commons/logging/impl/LogFactoryImpl.java
@@ -1230,6 +1230,7 @@ public class LogFactoryImpl extends LogFactory {
         if (isDiagnosticsEnabled()) {
             logDiagnostic("Could not instantiate Log '"
                       + logAdapterClassName + "' -- "
+                      + discoveryFlaw.getClass().getName() + ": "
                       + discoveryFlaw.getLocalizedMessage());       
         }