diff --git a/include/haproxy/mux_quic.h b/include/haproxy/mux_quic.h
index 0846ca7b7..3da5736e7 100644
--- a/include/haproxy/mux_quic.h
+++ b/include/haproxy/mux_quic.h
@@ -18,7 +18,6 @@ struct qcs *qcs_new(struct qcc *qcc, uint64_t id, enum qcs_type type);
 void qcs_free(struct qcs *qcs);
 
 struct buffer *qc_get_buf(struct qcs *qcs, struct buffer *bptr);
-struct ncbuf *qc_get_ncbuf(struct qcs *qcs, struct ncbuf *ncbuf);
 
 int qcs_subscribe(struct qcs *qcs, int event_type, struct wait_event *es);
 void qcs_notify_recv(struct qcs *qcs);
diff --git a/src/mux_quic.c b/src/mux_quic.c
index 455b43e48..cb7a09e6e 100644
--- a/src/mux_quic.c
+++ b/src/mux_quic.c
@@ -228,7 +228,7 @@ struct buffer *qc_get_buf(struct qcs *qcs, struct buffer *bptr)
 	return buf;
 }
 
-struct ncbuf *qc_get_ncbuf(struct qcs *qcs, struct ncbuf *ncbuf)
+static struct ncbuf *qc_get_ncbuf(struct qcs *qcs, struct ncbuf *ncbuf)
 {
 	struct buffer buf = BUF_NULL;