diff --git a/cmake/Modules/StyleHeaderUtils.cmake b/cmake/Modules/StyleHeaderUtils.cmake
index bbb93e6145..b0b9bd9418 100644
--- a/cmake/Modules/StyleHeaderUtils.cmake
+++ b/cmake/Modules/StyleHeaderUtils.cmake
@@ -25,7 +25,8 @@ function(CreateStyleHeader path filename)
         endforeach()
     endif()
     message(STATUS "Generating ${filename}...")
-    file(WRITE "${path}/${filename}" "${temp}" )
+    file(WRITE "${path}/${filename}.tmp" "${temp}" )
+    execute_process(COMMAND ${CMAKE_COMMAND} -E copy_if_different "${path}/${filename}.tmp" "${path}/${filename}")
 endfunction(CreateStyleHeader)
 
 function(GenerateStyleHeader path property style)