diff --git a/mm/slub.c b/mm/slub.c
index bdc9abb..0280eee 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2736,6 +2736,7 @@
 	 */
 	return s->size;
 }
+EXPORT_SYMBOL(ksize);
 
 void kfree(const void *x)
 {