diff --git a/arch/x86/kernel/vsmp_64.c b/arch/x86/kernel/vsmp_64.c
index b99b9ad8540c..ee22c1d93ae5 100644
--- a/arch/x86/kernel/vsmp_64.c
+++ b/arch/x86/kernel/vsmp_64.c
@@ -152,7 +152,7 @@ static void __init detect_vsmp_box(void)
 		is_vsmp = 1;
 }
 
-int is_vsmp_box(void)
+static int is_vsmp_box(void)
 {
 	if (is_vsmp != -1)
 		return is_vsmp;
@@ -166,7 +166,7 @@ int is_vsmp_box(void)
 static void __init detect_vsmp_box(void)
 {
 }
-int is_vsmp_box(void)
+static int is_vsmp_box(void)
 {
 	return 0;
 }