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-rw-r--r--ui/simple_dialog.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/ui/simple_dialog.h b/ui/simple_dialog.h
index cd42c7a074..ed4139a8a3 100644
--- a/ui/simple_dialog.h
+++ b/ui/simple_dialog.h
@@ -125,7 +125,7 @@ extern void vsimple_error_message_box(const char *msg_format, va_list ap);
/*
* Error alert box, taking a format and a list of arguments.
*/
-extern void simple_error_message_box(const char *msg_format, ...);
+extern void simple_error_message_box(const char *msg_format, ...) G_GNUC_PRINTF(1, 2);
#ifdef __cplusplus
}