diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 1913af6..fc8f36d 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -1586,7 +1586,7 @@
 static inline int xfrm_mark_get(struct nlattr **attrs, struct xfrm_mark *m)
 {
 	if (attrs[XFRMA_MARK])
-		memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(m));
+		memcpy(m, nla_data(attrs[XFRMA_MARK]), sizeof(struct xfrm_mark));
 	else
 		m->v = m->m = 0;