diff --git a/msc.cmake b/msc.cmake
index 1a1688856cb..45a4fe3140e 100644
--- a/msc.cmake
+++ b/msc.cmake
@@ -195,7 +195,7 @@ endmacro()
 macro(spec2def _dllname _spec_file)
     get_filename_component(_file ${_spec_file} NAME_WE)
     add_custom_command(
-        OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${_file}.def
+        OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${_file}.def ${CMAKE_CURRENT_BINARY_DIR}/${_file}_stubs.c
         COMMAND native-spec2def -@ -n=${_dllname} -d=${CMAKE_CURRENT_BINARY_DIR}/${_file}.def -s=${CMAKE_CURRENT_BINARY_DIR}/${_file}_stubs.c ${CMAKE_CURRENT_SOURCE_DIR}/${_spec_file}
         DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/${_spec_file})
     set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/${_file}.def ${CMAKE_CURRENT_BINARY_DIR}/${_file}_stubs.c