diff --git a/cmd-queue.c b/cmd-queue.c
index c35d0c62..e9073c92 100644
--- a/cmd-queue.c
+++ b/cmd-queue.c
@@ -80,7 +80,7 @@ cmdq_print(struct cmd_q *cmdq, const char *fmt, ...)
 		/* nothing */;
 	else if (c->session == NULL || (c->flags & CLIENT_CONTROL)) {
 		if (~c->flags & CLIENT_UTF8) {
-			vasprintf(&tmp, fmt, ap);
+			xvasprintf(&tmp, fmt, ap);
 			msg = utf8_sanitize(tmp);
 			free(tmp);
 			evbuffer_add(c->stdout_data, msg, strlen(msg));
diff --git a/input.c b/input.c
index 289a25c8..5c11a61d 100644
--- a/input.c
+++ b/input.c
@@ -961,7 +961,7 @@ input_reply(struct input_ctx *ictx, const char *fmt, ...)
 	char   *reply;
 
 	va_start(ap, fmt);
-	vasprintf(&reply, fmt, ap);
+	xvasprintf(&reply, fmt, ap);
 	va_end(ap);
 
 	bufferevent_write(ictx->wp->event, reply, strlen(reply));