diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 56ed407..e055f25 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -515,8 +515,8 @@
 	}
 }
 
-int tcp_splice_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb,
-			 unsigned int offset, size_t len)
+static int tcp_splice_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb,
+				unsigned int offset, size_t len)
 {
 	struct tcp_splice_state *tss = rd_desc->arg.data;