diff --git a/tools/ci_build/build.py b/tools/ci_build/build.py
index ccba55b0ea..57ad666e37 100644
--- a/tools/ci_build/build.py
+++ b/tools/ci_build/build.py
@@ -429,7 +429,7 @@ def parse_arguments():
     parser.add_argument(
         "--cmake_generator",
         choices=['Visual Studio 15 2017', 'Visual Studio 16 2019', 'Ninja'],
-        default='Visual Studio 15 2017' if is_windows() else None,
+        default='Visual Studio 16 2019' if is_windows() else None,
         help="Specify the generator that CMake invokes. "
         "This is only supported on Windows")
     parser.add_argument(