Add format function annotation.
diff --git a/tar/bsdtar.h b/tar/bsdtar.h
index ee9c648..9c551fc 100644
--- a/tar/bsdtar.h
+++ b/tar/bsdtar.h
@@ -189,7 +189,7 @@
int edit_pathname(struct bsdtar *, struct archive_entry *);
int need_report(void);
int pathcmp(const char *a, const char *b);
-void safe_fprintf(FILE *, const char *fmt, ...);
+void safe_fprintf(FILE *, const char *fmt, ...) __LA_PRINTF(2, 3);
void set_chdir(struct bsdtar *, const char *newdir);
const char *tar_i64toa(int64_t);
void tar_mode_c(struct bsdtar *bsdtar);
@@ -198,7 +198,7 @@
void tar_mode_u(struct bsdtar *bsdtar);
void tar_mode_x(struct bsdtar *bsdtar);
void usage(void);
-int yes(const char *fmt, ...);
+int yes(const char *fmt, ...) __LA_PRINTF(1, 2);
#if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H)
void add_substitution(struct bsdtar *, const char *);
