diff --git a/common/source/java/ch/systemsx/cisd/common/utilities/PropertyUtils.java b/common/source/java/ch/systemsx/cisd/common/utilities/PropertyUtils.java
index d04eb59207f1fde8515b421b53a1f6671fc01734..9cd4ead85783c54f28ed5b20048fa37ab34340ca 100644
--- a/common/source/java/ch/systemsx/cisd/common/utilities/PropertyUtils.java
+++ b/common/source/java/ch/systemsx/cisd/common/utilities/PropertyUtils.java
@@ -349,7 +349,7 @@ public final class PropertyUtils
     // Helper classes
     //
 
-    private static enum Boolean
+    public static enum Boolean
     {
         TRUE("1", "yes", "true"), FALSE("0", "no", "false");