mark internal packages as x-internal
diff --git a/plugins/org.eclipse.objectteams.otdt.debug.ui/META-INF/MANIFEST.MF b/plugins/org.eclipse.objectteams.otdt.debug.ui/META-INF/MANIFEST.MF
index 21d7ce3..4fea1c1 100644
--- a/plugins/org.eclipse.objectteams.otdt.debug.ui/META-INF/MANIFEST.MF
+++ b/plugins/org.eclipse.objectteams.otdt.debug.ui/META-INF/MANIFEST.MF
@@ -25,9 +25,9 @@
  org.eclipse.objectteams.otdt;bundle-version="[0.8.0,1.0.0)",
  org.eclipse.objectteams.runtime
 Export-Package: org.eclipse.objectteams.otdt.debug.ui,
- org.eclipse.objectteams.otdt.debug.ui.internal,
- org.eclipse.objectteams.otdt.debug.ui.internal.actions,
- org.eclipse.objectteams.otdt.debug.ui.internal.preferences,
+ org.eclipse.objectteams.otdt.debug.ui.internal;x-internal:=true,
+ org.eclipse.objectteams.otdt.debug.ui.internal.actions;x-internal:=true,
+ org.eclipse.objectteams.otdt.debug.ui.internal.preferences;x-internal:=true,
  org.eclipse.objectteams.otdt.debug.ui.views
 Bundle-ActivationPolicy: lazy
 Bundle-RequiredExecutionEnvironment: J2SE-1.5