diff --git a/net/dccp/ccid.h b/net/dccp/ccid.h
index c37eeea..de681c6 100644
--- a/net/dccp/ccid.h
+++ b/net/dccp/ccid.h
@@ -21,6 +21,8 @@
 
 #define CCID_MAX 255
 
+struct tcp_info;
+
 struct ccid {
 	unsigned char	ccid_id;
 	const char	*ccid_name;