diff --git a/CMakeLists.txt b/CMakeLists.txt
index f14a603099..d7c9b15998 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -84,7 +84,7 @@ if(CMAKE_SYSTEM_NAME STREQUAL Windows)
   endif()
 endif()
 
-set(libdispatch_cflags -I;${FOUNDATION_PATH_TO_LIBDISPATCH_SOURCE};-I;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}/src/swift;-Xcc;-fblocks)
+set(libdispatch_cflags -I;${FOUNDATION_PATH_TO_LIBDISPATCH_SOURCE};-I;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}/src/swift;-I;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}/src/swift/swift;-Xcc;-fblocks)
 set(libdispatch_ldflags -L;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD};-L;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}/bin;-L;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}/src/BlocksRuntime;-L;${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}/src;-ldispatch;-lswiftDispatch)
 if(CMAKE_SYSTEM_NAME STREQUAL Linux OR CMAKE_SYSTEM_NAME STREQUAL Android OR CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
   file(TO_CMAKE_PATH "${FOUNDATION_PATH_TO_LIBDISPATCH_BUILD}" FOUNDATION_PATH_TO_LIBDISPATCH_BUILD)