diff --git a/ThunkLibs/libxcb/WorkEventData.h b/ThunkLibs/libxcb/WorkEventData.h
new file mode 100644
index 000000000..d38d9e5c1
--- /dev/null
+++ b/ThunkLibs/libxcb/WorkEventData.h
@@ -0,0 +1,8 @@
+#pragma once
+#include <cstdint>
+
+struct CBWork {
+  uintptr_t cb;
+  void *argsv;
+};
+