diff --git a/bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/dialogs/CustomizePerspectiveDialog.java b/bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/dialogs/CustomizePerspectiveDialog.java
index 8d688c3..b7b37c6 100644
--- a/bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/dialogs/CustomizePerspectiveDialog.java
+++ b/bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/dialogs/CustomizePerspectiveDialog.java
@@ -2386,7 +2386,10 @@
 	 *         set, that that action set is available
 	 */
 	private static boolean isAvailable(DisplayItem item) {
-		if (item.getActionSet() != null && item.getActionSet().isActive()) {
+		if (item.getActionSet() == null) {
+			return true;
+		}
+		if (item.getActionSet().isActive()) {
 			return true;
 		}
 		for (Iterator i = item.getChildren().iterator(); i.hasNext();) {