diff --git a/src/rt/test/rust_test_runtime.cpp b/src/rt/test/rust_test_runtime.cpp
index b10be5edf4001..1cde532e94a51 100644
--- a/src/rt/test/rust_test_runtime.cpp
+++ b/src/rt/test/rust_test_runtime.cpp
@@ -54,7 +54,7 @@ rust_task_test::worker::run() {
         kernel->create_domain(crate, "test");
     rust_dom *domain = handle->referent();
     domain->root_task->start(crate->get_exit_task_glue(),
-                             (uintptr_t)&task_entry, NULL, 0);
+                             (uintptr_t)&task_entry, (uintptr_t)NULL, 0);
     domain->start_main_loop();
     kernel->destroy_domain(domain);
 }