Index: src/org/jboss/tools/hibernate/jpt/ui/internal/mapping/details/HibernateGenerationComposite.java
===================================================================
--- src/org/jboss/tools/hibernate/jpt/ui/internal/mapping/details/HibernateGenerationComposite.java	(revision 31724)
+++ src/org/jboss/tools/hibernate/jpt/ui/internal/mapping/details/HibernateGenerationComposite.java	(working copy)
@@ -63,6 +63,7 @@
 		super.doPopulate();
 		this.genericGeneratorExpansionStateHolder .setValue(Boolean.valueOf(getSubject() != null
 				&& getSubject().genericGeneratorsSize() > 0));
+		this.generatorHolder.setValue(getSubject() != null && getSubject().genericGeneratorsSize() > 0 ? getSubject().genericGenerators().next() : null);
 	}
 	
 	@Override