diff --git a/include/kernel/kernel.h b/include/kernel/kernel.h
index da84f0c51ad48b4dc3478d8bd380f875f48d8f35..536b84f6c591cc2d0b5c645182959e5769ce62dc 100644
--- a/include/kernel/kernel.h
+++ b/include/kernel/kernel.h
@@ -22,6 +22,7 @@
 
 
 #define offset_of(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
+#define member_size(TYPE, MEMBER) (sizeof(((TYPE *)0)->MEMBER))
 
 /* linux/kernel.h */
 #define container_of(ptr, type, member) ({                      \