diff --git a/sys/netinet/sctp_output.c b/sys/netinet/sctp_output.c
index 4ef87057174b..d1a34e6e06ee 100644
--- a/sys/netinet/sctp_output.c
+++ b/sys/netinet/sctp_output.c
@@ -6412,7 +6412,7 @@ sctp_copy_mbufchain(struct mbuf *clonechain,
 	}
 }
 
-int
+static int
 sctp_med_chunk_output(struct sctp_inpcb *inp,
     struct sctp_tcb *stcb,
     struct sctp_association *asoc,