diff --git a/examples/grpc/clientguide/server/main.cpp b/examples/grpc/clientguide/server/main.cpp
index bbf746b7..cf95040f 100644
--- a/examples/grpc/clientguide/server/main.cpp
+++ b/examples/grpc/clientguide/server/main.cpp
@@ -20,7 +20,9 @@ namespace {
 
 int64_t now()
 {
-    return std::chrono::system_clock::now().time_since_epoch().count();
+    return std::chrono::duration_cast<std::chrono::milliseconds>(std::chrono::system_clock::now()
+                                                                     .time_since_epoch())
+        .count();
 }
 
 std::ostream &operator<<(std::ostream &stream, const Request &request)