diff --git a/reactos/drivers/filters/fltmgr/CMakeLists.txt b/reactos/drivers/filters/fltmgr/CMakeLists.txt
index 89acdcc1fcd..ea527186d2c 100644
--- a/reactos/drivers/filters/fltmgr/CMakeLists.txt
+++ b/reactos/drivers/filters/fltmgr/CMakeLists.txt
@@ -1,10 +1,10 @@
-
 list(APPEND SOURCE
     Context.c
     Dispatch.c
     Filter.c
     Interface.c
     Lib.c
+    Messaging.c
     Object.c
     ${CMAKE_CURRENT_BINARY_DIR}/fltmgr.def
     fltmgr.h)
@@ -22,5 +22,6 @@ add_library(fltmgr SHARED
 set_module_type(fltmgr kernelmodedriver)
 target_link_libraries(fltmgr ${PSEH_LIB})
 add_importlibs(fltmgr ntoskrnl hal)
+add_target_compile_definitions(fltmgr NTDDI_VERSION=NTDDI_WS03SP1)
 add_pch(fltmgr fltmgr.h SOURCE)
 add_cd_file(TARGET fltmgr DESTINATION reactos/system32/drivers NO_CAB FOR all)