diff --git a/src/mux_pt.c b/src/mux_pt.c
index dbdd78b094..71f26e7534 100644
--- a/src/mux_pt.c
+++ b/src/mux_pt.c
@@ -51,6 +51,9 @@ static int mux_pt_wake(struct connection *conn)
 
 	ret = cs->data_cb->wake ? cs->data_cb->wake(cs) : 0;
 
+	if (ret < 0)
+		return ret;
+
 	/* If we had early data, and we're done with the handshake
 	 * then whe know the data are safe, and we can remove the flag.
 	 */