diff --git a/net/dccp/options.c b/net/dccp/options.c
index c3cda1e..daf72bb 100644
--- a/net/dccp/options.c
+++ b/net/dccp/options.c
@@ -29,6 +29,8 @@
 int dccp_feat_default_send_ack_vector = DCCPF_INITIAL_SEND_ACK_VECTOR;
 int dccp_feat_default_send_ndp_count  = DCCPF_INITIAL_SEND_NDP_COUNT;
 
+EXPORT_SYMBOL_GPL(dccp_feat_default_sequence_window);
+
 void dccp_minisock_init(struct dccp_minisock *dmsk)
 {
 	dmsk->dccpms_sequence_window = dccp_feat_default_sequence_window;