diff --git a/net/dccp/output.c b/net/dccp/output.c
index ef22f3c..c34eada 100644
--- a/net/dccp/output.c
+++ b/net/dccp/output.c
@@ -333,6 +333,7 @@
 		return NULL;
 	}
 
+	/* Build and checksum header */
 	dh = dccp_zeroed_hdr(skb, dccp_header_size);
 
 	dh->dccph_sport	= inet_sk(sk)->sport;