diff --git a/reactos/cmake/msvc.cmake b/reactos/cmake/msvc.cmake
index 16949003343..f091215e58b 100644
--- a/reactos/cmake/msvc.cmake
+++ b/reactos/cmake/msvc.cmake
@@ -302,7 +302,7 @@ function(spec2def _dllname _spec_file)
 endfunction()
 
 macro(macro_mc FLAG FILE)
-    set(COMMAND_MC ${CMAKE_MC_COMPILER} ${FLAG} -r ${REACTOS_BINARY_DIR}/include/reactos -h ${REACTOS_BINARY_DIR}/include/reactos ${CMAKE_CURRENT_SOURCE_DIR}/${FILE}.mc)
+    set(COMMAND_MC ${CMAKE_MC_COMPILER} ${FLAG} -b ${CMAKE_CURRENT_SOURCE_DIR}/${FILE}.mc -r ${REACTOS_BINARY_DIR}/include/reactos -h ${REACTOS_BINARY_DIR}/include/reactos)
 endmacro()
 
 #pseh workaround