diff --git a/arch/um/kernel/smp.c b/arch/um/kernel/smp.c
index 98351c78bc814de7062dc5e9c213810ee4811de5..106bf27e2a9a5fc96abf5056bfbe070a6e4f709f 100644
--- a/arch/um/kernel/smp.c
+++ b/arch/um/kernel/smp.c
@@ -111,7 +111,7 @@ void smp_prepare_cpus(unsigned int maxcpus)
 	int i;
 
 	for (i = 0; i < ncpus; ++i)
-		cpu_set(i, cpu_possible_map);
+		set_cpu_possible(i, true);
 
 	cpu_clear(me, cpu_online_map);
 	cpu_set(me, cpu_online_map);