diff --git a/arch/sim/src/up_idle.c b/arch/sim/src/up_idle.c
index 7d531e32f4..1459845c15 100644
--- a/arch/sim/src/up_idle.c
+++ b/arch/sim/src/up_idle.c
@@ -43,8 +43,14 @@
 #include <time.h>
 
 #include <nuttx/arch.h>
-#include <nuttx/spinlock.h>
-#include <nuttx/power/pm.h>
+
+#ifdef CONFIG_PM
+#  include <nuttx/power/pm.h>
+#endif
+
+#ifdef CONFIG_SMP
+#  include <nuttx/spinlock.h>
+#endif
 
 #include "up_internal.h"