diff --git a/llvm/utils/gn/build/BUILD.gn b/llvm/utils/gn/build/BUILD.gn
--- a/llvm/utils/gn/build/BUILD.gn
+++ b/llvm/utils/gn/build/BUILD.gn
@@ -283,7 +283,7 @@
       "-Werror=date-time",
     ]
     if (current_os == "win") {
-      cflags += [ "-fmsc-version=1916" ]
+      cflags += [ "-fmsc-version=1920" ]
       if (use_lld) {
         cflags += [ "/Brepro" ]
         ldflags += [ "/Brepro" ]