diff --git a/arch/x86/kernel/vsmp_64.c b/arch/x86/kernel/vsmp_64.c
index caf2a26f5cfd..ba8c0b75ab0a 100644
--- a/arch/x86/kernel/vsmp_64.c
+++ b/arch/x86/kernel/vsmp_64.c
@@ -133,7 +133,7 @@ int is_vsmp_box(void)
 	}
 }
 #else
-static int __init detect_vsmp_box(void)
+static void __init detect_vsmp_box(void)
 {
 }
 int is_vsmp_box(void)