diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index a417a1cd6..3651704e5 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -30,6 +30,7 @@ IF(DYNAMIC_OPENSCENEGRAPH)
     ADD_SUBDIRECTORY(osgcopy)
     ADD_SUBDIRECTORY(osgcubemap)
     ADD_SUBDIRECTORY(osgdelaunay)
+    ADD_SUBDIRECTORY(osgcluster)
     ADD_SUBDIRECTORY(osgdepthpartition)
     ADD_SUBDIRECTORY(osgdepthpeeling)
     ADD_SUBDIRECTORY(osgdrawinstanced)
@@ -160,9 +161,9 @@ IF(DYNAMIC_OPENSCENEGRAPH)
         ADD_SUBDIRECTORY(osgviewerWX)
     ENDIF(wxWidgets_FOUND)
 
-    IF   (QT_FOUND)
+    IF   (QT_FOUND AND QT_QTOPENGL_LIBRARY)
         ADD_SUBDIRECTORY(osgviewerQT)
-    ENDIF(QT_FOUND)
+    ENDIF(QT_FOUND AND QT_QTOPENGL_LIBRARY)
 
     IF   (FLTK_FOUND)
         ADD_SUBDIRECTORY(osgviewerFLTK)