diff --git a/tools/perf/bench/bench.h b/tools/perf/bench/bench.h
index 59adb27..42167ea 100644
--- a/tools/perf/bench/bench.h
+++ b/tools/perf/bench/bench.h
@@ -6,4 +6,13 @@
 extern int bench_sched_pipe(int argc, const char **argv,
 			    const char *prefix);
 
+#define BENCH_FORMAT_DEFAULT_STR "default"
+#define BENCH_FORMAT_DEFAULT 0
+#define BENCH_FORMAT_SIMPLE_STR "simple"
+#define BENCH_FORMAT_SIMPLE 1
+
+#define BENCH_FORMAT_UNKNOWN -1
+
+extern int bench_format;
+
 #endif