diff --git a/CMakeMacros.cmake b/CMakeMacros.cmake
index 5c0b50fc33b..81a0a4b0696 100644
--- a/CMakeMacros.cmake
+++ b/CMakeMacros.cmake
@@ -241,15 +241,10 @@ endmacro()
 
 macro(add_idl_interface IDL_FILE)
     custom_incdefs()
-    if(ARCH MATCHES i386)
-        set(platform_flags "-m32 --win32")
-    elseif(ARCH MATCHES amd64)
-        set(platform_flags "-m64 --win64")
-    endif()
     get_filename_component(FILE ${IDL_FILE} NAME_WE)
     add_custom_command(
         OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${FILE}_i.c
-        COMMAND ${IDL_COMPILER} ${result_incs} ${result_defs} ${platform_flags} -u -U ${CMAKE_CURRENT_BINARY_DIR}/${FILE}_i.c ${CMAKE_CURRENT_SOURCE_DIR}/${IDL_FILE}
+        COMMAND ${IDL_COMPILER} ${result_incs} ${result_defs} ${IDL_FLAGS} -u -U ${CMAKE_CURRENT_BINARY_DIR}/${FILE}_i.c ${CMAKE_CURRENT_SOURCE_DIR}/${IDL_FILE}
         DEPENDS ${IDL_FILE})
     set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${FILE}_i.c PROPERTIES GENERATED TRUE)
 endmacro()