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-rw-r--r--ui/alert_box.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/ui/alert_box.h b/ui/alert_box.h
index 69f11faa51..1028027eb1 100644
--- a/ui/alert_box.h
+++ b/ui/alert_box.h
@@ -31,7 +31,8 @@ extern "C" {
/*
* Alert box for general errors.
*/
-extern void failure_alert_box(const char *msg_format, va_list ap);
+extern void failure_alert_box(const char *msg_format, ...) G_GNUC_PRINTF(1, 2);
+extern void vfailure_alert_box(const char *msg_format, va_list ap);
/*
* Alert box for a failed attempt to open or create a file.