diff --git a/lib/kobject.c b/lib/kobject.c
index 2e3bd01..3e3a5c3 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -337,8 +337,9 @@
 }
 EXPORT_SYMBOL(kobject_init);
 
-static int kobject_add_varg(struct kobject *kobj, struct kobject *parent,
-			    const char *fmt, va_list vargs)
+static __printf(3, 0) int kobject_add_varg(struct kobject *kobj,
+					   struct kobject *parent,
+					   const char *fmt, va_list vargs)
 {
 	int retval;