diff --git a/src/OpenMesh/Apps/Decimating/DecimaterGui/CMakeLists.txt b/src/OpenMesh/Apps/Decimating/DecimaterGui/CMakeLists.txt
index 15bf38cb..4c5860a5 100644
--- a/src/OpenMesh/Apps/Decimating/DecimaterGui/CMakeLists.txt
+++ b/src/OpenMesh/Apps/Decimating/DecimaterGui/CMakeLists.txt
@@ -14,6 +14,7 @@ set (directories
 # collect all header and source files
 acg_append_files (headers "*.hh" ${directories})
 list (APPEND headers "../../QtViewer/MeshViewerWidgetT_impl.hh")
+list (APPEND headers "../../QtViewer/MeshViewerWidget.hh")
 
 
 set (sources
diff --git a/src/OpenMesh/Apps/Subdivider/SubdividerGui/CMakeLists.txt b/src/OpenMesh/Apps/Subdivider/SubdividerGui/CMakeLists.txt
index a31ee248..603e9d35 100644
--- a/src/OpenMesh/Apps/Subdivider/SubdividerGui/CMakeLists.txt
+++ b/src/OpenMesh/Apps/Subdivider/SubdividerGui/CMakeLists.txt
@@ -15,6 +15,7 @@ set (directories
 acg_append_files (headers "*.hh" ${directories})
 
 list (APPEND headers "../../QtViewer/MeshViewerWidgetT_impl.hh")
+list (APPEND headers "../../QtViewer/MeshViewerWidget.hh")
 
 
 set (sources