diff --git a/arch/um/kernel/process_kern.c b/arch/um/kernel/process_kern.c
index 0c57bc6e3747..d4036ed680bc 100644
--- a/arch/um/kernel/process_kern.c
+++ b/arch/um/kernel/process_kern.c
@@ -169,7 +169,7 @@ int current_pid(void)
 
 void default_idle(void)
 {
-	uml_idle_timer();
+	CHOOSE_MODE(uml_idle_timer(), (void) 0);
 
 	atomic_inc(&init_mm.mm_count);
 	current->mm = &init_mm;
diff --git a/arch/um/kernel/skas/process_kern.c b/arch/um/kernel/skas/process_kern.c
index 8f0607f54b7a..0a7b8aa55db8 100644
--- a/arch/um/kernel/skas/process_kern.c
+++ b/arch/um/kernel/skas/process_kern.c
@@ -180,7 +180,6 @@ int start_uml_skas(void)
 	start_userspace(0);
 
 	init_new_thread_signals(1);
-	uml_idle_timer();
 
 	init_task.thread.request.u.thread.proc = start_kernel_proc;
 	init_task.thread.request.u.thread.arg = NULL;