diff --git a/onnxruntime/test/perftest/ort_test_session.cc b/onnxruntime/test/perftest/ort_test_session.cc
index 99d186c1a7973..bc1f1f3f50a9b 100644
--- a/onnxruntime/test/perftest/ort_test_session.cc
+++ b/onnxruntime/test/perftest/ort_test_session.cc
@@ -49,7 +49,9 @@ std::chrono::duration<double> OnnxRuntimeTestSession::Run() {
     }
 
    private:
-    Timer() = default;
+    Timer(std::chrono::high_resolution_clock::time_point start) :
+      start_(start)
+    {}
   };
 
   auto timer = Timer::Start();