1 files changed, 2 insertions, 0 deletions
diff --git a/cache.h b/cache.h
index ce377e1354..55dd4e3c8e 100644
--- a/cache.h
+++ b/cache.h
@@ -1236,6 +1236,8 @@ __attribute__((format (printf, 2, 3)))
 extern void trace_argv_printf(const char **argv, const char *format, ...);
 extern void trace_repo_setup(const char *prefix);
 extern int trace_want(const char *key);
+__attribute__((format (printf, 2, 3)))
+extern void trace_printf_key(const char *key, const char *fmt, ...);
 extern void trace_strbuf(const char *key, const struct strbuf *buf);
 
 void packet_trace_identity(const char *prog);