Index: uspace/lib/display/src/disp_srv.c
===================================================================
--- uspace/lib/display/src/disp_srv.c	(revision 06176e1f247c6c0450877aea38262568fcb8b9d7)
+++ uspace/lib/display/src/disp_srv.c	(revision ffed09d79c4f737ed0a49581161c8c053ce34980)
@@ -1,4 +1,4 @@
 /*
- * Copyright (c) 2022 Jiri Svoboda
+ * Copyright (c) 2023 Jiri Svoboda
  * All rights reserved.
  *
@@ -241,4 +241,5 @@
 
 	if (!async_data_read_receive(&call, &size)) {
+		async_answer_0(&call, EREFUSED);
 		async_answer_0(icall, EREFUSED);
 		return;
@@ -285,4 +286,5 @@
 
 	if (!async_data_read_receive(&call, &size)) {
+		async_answer_0(&call, EREFUSED);
 		async_answer_0(icall, EREFUSED);
 		return;
@@ -521,4 +523,5 @@
 	/* Transfer event data */
 	if (!async_data_read_receive(&call, &size)) {
+		async_answer_0(&call, EREFUSED);
 		async_answer_0(icall, EREFUSED);
 		return;
@@ -555,4 +558,5 @@
 	/* Transfer information */
 	if (!async_data_read_receive(&call, &size)) {
+		async_answer_0(&call, EREFUSED);
 		async_answer_0(icall, EREFUSED);
 		return;