diff --git a/include/haproxy/connection-t.h b/include/haproxy/connection-t.h
index 3c0693883..2029bf851 100644
--- a/include/haproxy/connection-t.h
+++ b/include/haproxy/connection-t.h
@@ -334,6 +334,7 @@ enum mux_ctl_type {
 	MUX_STATUS, /* Expects an int as output, sets it to a combinaison of MUX_STATUS flags */
 	MUX_EXIT_STATUS, /* Expects an int as output, sets the mux exist/error/http status, if known or 0 */
 	MUX_REVERSE_CONN, /* Notify about an active reverse connection accepted. */
+	MUX_SUBS_RECV, /* Notify the mux it must wait for read events again  */
 };
 
 /* response for ctl MUX_STATUS */