diff --git a/monitor.c b/monitor.c
index ee9744cfb6..8c23e29d8f 100644
--- a/monitor.c
+++ b/monitor.c
@@ -3171,7 +3171,8 @@ static const MonitorDef monitor_defs[] = {
     { NULL },
 };
 
-static void expr_error(Monitor *mon, const char *fmt, ...)
+static void GCC_FMT_ATTR(2, 3) QEMU_NORETURN
+expr_error(Monitor *mon, const char *fmt, ...)
 {
     va_list ap;
     va_start(ap, fmt);