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 *);