diff --git a/src/dawn_native/CMakeLists.txt b/src/dawn_native/CMakeLists.txt
index ea3684ecb9..8c0c5f6094 100644
--- a/src/dawn_native/CMakeLists.txt
+++ b/src/dawn_native/CMakeLists.txt
@@ -180,6 +180,10 @@ if (DAWN_USE_X11)
     find_package(X11 REQUIRED)
     target_link_libraries(dawn_native PRIVATE ${X11_LIBRARIES})
     target_include_directories(dawn_native PRIVATE ${X11_INCLUDE_DIR})
+    target_sources(dawn_native PRIVATE
+        "XlibXcbFunctions.cpp"
+        "XlibXcbFunctions.h"
+    )
 endif()
 
 if (WIN32)