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-rw-r--r--common.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/common.h b/common.h
index ff577c259..1182d77aa 100644
--- a/common.h
+++ b/common.h
@@ -31,7 +31,7 @@ void ui_clear_key_queue();
// Write a message to the on-screen log shown with Alt-L (also to stderr).
// The screen is small, and users may need to report these messages to support,
// so keep the output short and not too cryptic.
-void ui_print(const char *fmt, ...);
+void ui_print(const char *fmt, ...) __attribute__((format(printf, 1, 2)));
// Display some header text followed by a menu of items, which appears
// at the top of the screen (in place of any scrolling ui_print()