diff --git a/Benchmark.h b/Benchmark.h
index 02e22d5..13f9009 100644
--- a/Benchmark.h
+++ b/Benchmark.h
@@ -25,7 +25,8 @@
 namespace android {
 namespace vold {
 
-nsecs_t Benchmark(const std::string& path, const std::string& sysPath);
+/* Benchmark a private volume mounted at the given path */
+nsecs_t BenchmarkPrivate(const std::string& path);
 
 }  // namespace vold
 }  // namespace android