diff --git a/src/backends/validation/CMakeLists.txt b/src/backends/validation/CMakeLists.txt
index 1250d930f..a3b635132 100644
--- a/src/backends/validation/CMakeLists.txt
+++ b/src/backends/validation/CMakeLists.txt
@@ -5,6 +5,7 @@ set(LUISA_COMPUTE_VALIDATION_SOURCES
         depth_buffer.h
         device.cpp device.h
         dstorage_ext_impl.cpp dstorage_ext_impl.h
+        dx_hdr_ext_impl.cpp dx_hdr_ext_impl.h
         native_res_ext_impl.cpp native_res_ext_impl.h
         event.h
         mesh.h