diff --git a/Applications/DataExplorer/CMakeLists.txt b/Applications/DataExplorer/CMakeLists.txt
index 6f5501a92724b119bf5b30a1a28d3d704ab7365c..7215199550028e353c250a36533595cf4f2630f0 100644
--- a/Applications/DataExplorer/CMakeLists.txt
+++ b/Applications/DataExplorer/CMakeLists.txt
@@ -3,7 +3,9 @@ if(QT4_FOUND)
 else()
 	set(VTK_QT_VERSION 5 CACHE INTERNAL "")
 endif()
-add_subdirectory(VtkModules/Qt)
+if(NOT TARGET vtkGUISupportQt)
+	add_subdirectory(VtkModules/Qt)
+endif()
 
 if(VTKFBXCONVERTER_FOUND)
 	add_definitions(-DVTKFBXCONVERTER_FOUND)