diff --git a/test/testsupport/perf_test_histogram_writer_no_protobuf.cc b/test/testsupport/perf_test_histogram_writer_no_protobuf.cc
index 17685ccb0d..14deb37c66 100644
--- a/test/testsupport/perf_test_histogram_writer_no_protobuf.cc
+++ b/test/testsupport/perf_test_histogram_writer_no_protobuf.cc
@@ -16,6 +16,7 @@ namespace test {
 PerfTestResultWriter* CreateHistogramWriter() {
   RTC_NOTREACHED() << "Cannot run perf tests with rtc_enable_protobuf = false. "
                       "Perf write results as protobufs.";
+  return nullptr;
 }
 
 }  // namespace test