diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index 7f5be08..34e70fb 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h
@@ -326,13 +326,13 @@
 	       inet_csk_ack_scheduled(sk);
 }
 
-extern void dccp_insert_options(struct sock *sk, struct sk_buff *skb);
-extern void dccp_insert_option_elapsed_time(struct sock *sk,
+extern int dccp_insert_options(struct sock *sk, struct sk_buff *skb);
+extern int dccp_insert_option_elapsed_time(struct sock *sk,
 					    struct sk_buff *skb,
 					    u32 elapsed_time);
-extern void dccp_insert_option_timestamp(struct sock *sk,
+extern int dccp_insert_option_timestamp(struct sock *sk,
 					 struct sk_buff *skb);
-extern void dccp_insert_option(struct sock *sk, struct sk_buff *skb,
+extern int dccp_insert_option(struct sock *sk, struct sk_buff *skb,
 			       unsigned char option,
 			       const void *value, unsigned char len);