diff --git a/reactos/dll/win32/rpcrt4/CMakeLists.txt b/reactos/dll/win32/rpcrt4/CMakeLists.txt
index 05dfb4a3cba..a6b142a1b50 100644
--- a/reactos/dll/win32/rpcrt4/CMakeLists.txt
+++ b/reactos/dll/win32/rpcrt4/CMakeLists.txt
@@ -35,6 +35,7 @@ remove_definitions(-D_WIN32_WINNT=0x502)
 add_definitions(-D_WIN32_WINNT=0x600)
 
 add_definitions(
+    -D__WINESRC__
     -D_RPCRT4_
     -DCOM_NO_WINDOWS_H
     -DMSWMSG)
diff --git a/reactos/dll/win32/shdocvw/CMakeLists.txt b/reactos/dll/win32/shdocvw/CMakeLists.txt
index c48f7286a14..34b51022118 100644
--- a/reactos/dll/win32/shdocvw/CMakeLists.txt
+++ b/reactos/dll/win32/shdocvw/CMakeLists.txt
@@ -1,7 +1,9 @@
 
 add_typelib(shdocvw_v1.idl)
 
-add_definitions(-D_SHDOCVW_)
+add_definitions(
+    -D__WINESRC__
+    -D_SHDOCVW_)
 include_directories(${REACTOS_SOURCE_DIR}/include/reactos/wine)
 
 spec2def(shdocvw.dll shdocvw.spec ADD_IMPORTLIB)