diff --git a/extras/Build/CMake/copyDir.cmake b/extras/Build/CMake/copyDir.cmake
index b93aa1724f..73b87fba1a 100644
--- a/extras/Build/CMake/copyDir.cmake
+++ b/extras/Build/CMake/copyDir.cmake
@@ -21,4 +21,4 @@
 #
 # ==============================================================================
 
-file(INSTALL ${src} DESTINATION ${dest})
+file(INSTALL ${src} DESTINATION ${dest} USE_SOURCE_PERMISSIONS)