diff --git a/clang-tools-extra/clangd/xpc/CMakeLists.txt b/clang-tools-extra/clangd/xpc/CMakeLists.txt
index df8c361817a849..d551f8b2b5b3cb 100644
--- a/clang-tools-extra/clangd/xpc/CMakeLists.txt
+++ b/clang-tools-extra/clangd/xpc/CMakeLists.txt
@@ -9,6 +9,7 @@ add_subdirectory(test-client)
 
 include_directories(
   ${CMAKE_CURRENT_SOURCE_DIR}/../
+  ${CMAKE_CURRENT_BINARY_DIR}/../
 )
 
 set(LLVM_LINK_COMPONENTS