diff --git a/include/haproxy/cs_utils.h b/include/haproxy/cs_utils.h
index 22b21b27b..10a03a8f5 100644
--- a/include/haproxy/cs_utils.h
+++ b/include/haproxy/cs_utils.h
@@ -348,6 +348,11 @@ static inline const char *cs_state_str(int state)
 __attribute__((warn_unused_result))
 static inline int sc_is_send_allowed(const struct stconn *sc)
 {
+	struct channel *oc = sc_oc(sc);
+
+	if (oc->flags & CF_SHUTW)
+		return 0;
+
 	return cs_tx_endp_ready(sc) && !cs_tx_blocked(sc);
 }