diff --git a/GraphicsView/demo/Alpha_shapes_3/CMakeLists.txt b/GraphicsView/demo/Alpha_shapes_3/CMakeLists.txt
index a7f72c06668..d22add79956 100644
--- a/GraphicsView/demo/Alpha_shapes_3/CMakeLists.txt
+++ b/GraphicsView/demo/Alpha_shapes_3/CMakeLists.txt
@@ -23,7 +23,7 @@ find_package(Qt4)
 find_package(OpenGL)
 find_package(QGLViewer)
 
-if ( CGAL_FOUND AND QT_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND )
+if ( CGAL_FOUND AND QT4_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND )
 
   include(${QT_USE_FILE})
 
diff --git a/Polyhedron/demo/Polyhedron/CMakeLists.txt b/Polyhedron/demo/Polyhedron/CMakeLists.txt
index 2d429abbcba..21c8f79d7f8 100644
--- a/Polyhedron/demo/Polyhedron/CMakeLists.txt
+++ b/Polyhedron/demo/Polyhedron/CMakeLists.txt
@@ -38,15 +38,15 @@ find_package(Qt4)
 find_package(OpenGL)
 
 # Find QGLViewer
-if(QT_FOUND)
+if(QT4_FOUND)
   include(${QT_USE_FILE})
   find_package(QGLViewer )
-endif(QT_FOUND)
+endif(QT4_FOUND)
 
 # Find TAUCS (optionnal)
 find_package(TAUCS)
 
-if(CGAL_Qt4_FOUND AND QT_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND)
+if(CGAL_Qt4_FOUND AND QT4_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND)
 
   include_directories ( ${QGLVIEWER_INCLUDE_DIR} )
 
@@ -122,7 +122,7 @@ if(CGAL_Qt4_FOUND AND QT_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND)
     target_link_libraries(Polyhedron_3 ${TAUCS_LIBRARIES})
   endif(TAUCS_FOUND)
 
-else (CGAL_Qt4_FOUND AND QT_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND)
+else (CGAL_Qt4_FOUND AND QT4_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND)
 
   set(POLYHEDRON_MISSING_DEPS "")
 
@@ -130,7 +130,7 @@ else (CGAL_Qt4_FOUND AND QT_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND)
     set(POLYHEDRON_MISSING_DEPS "the CGAL Qt4 library, ${POLYHEDRON_MISSING_DEPS}")
   endif()
 
-  if(NOT QT_FOUND)
+  if(NOT QT4_FOUND)
     set(POLYHEDRON_MISSING_DEPS "Qt4, ${POLYHEDRON_MISSING_DEPS}")
   endif()
 
@@ -144,4 +144,4 @@ else (CGAL_Qt4_FOUND AND QT_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND)
 
   message(STATUS "NOTICE: This demo requires ${POLYHEDRON_MISSING_DEPS}and will not be compiled.")
 
-endif (CGAL_Qt4_FOUND AND QT_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND)
+endif (CGAL_Qt4_FOUND AND QT4_FOUND AND OPENGL_FOUND AND QGLVIEWER_FOUND)