diff --git a/include/net/tcp.h b/include/net/tcp.h
index 265392470b26..e8ae90a8c35e 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -761,8 +761,6 @@ static inline unsigned int tcp_packets_in_flight(const struct tcp_sock *tp)
 	return tp->packets_out - tcp_left_out(tp) + tp->retrans_out;
 }
 
-extern int tcp_limit_reno_sacked(struct tcp_sock *tp);
-
 /* If cwnd > ssthresh, we may raise ssthresh to be half-way to cwnd.
  * The exception is rate halving phase, when cwnd is decreasing towards
  * ssthresh.
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c
index 9f8a80ba17bd..d67b6e9cc540 100644
--- a/net/ipv4/tcp_input.c
+++ b/net/ipv4/tcp_input.c
@@ -1940,7 +1940,7 @@ out:
 /* Limits sacked_out so that sum with lost_out isn't ever larger than
  * packets_out. Returns zero if sacked_out adjustement wasn't necessary.
  */
-int tcp_limit_reno_sacked(struct tcp_sock *tp)
+static int tcp_limit_reno_sacked(struct tcp_sock *tp)
 {
 	u32 holes;