diff --git a/src/Parser/Parser.cpp b/src/Parser/Parser.cpp
index c138448e..161a02b8 100644
--- a/src/Parser/Parser.cpp
+++ b/src/Parser/Parser.cpp
@@ -184,6 +184,11 @@ void Parser::SetupHeader()
                 /*IgnoreSysRoot=*/false);
     }
 
+    if (Opts->MicrosoftMode)
+    {
+        LangOpts.MSCVersion = Opts->ToolSetToUse;
+        if (!LangOpts.MSCVersion) LangOpts.MSCVersion = 1700;
+    }
 #endif
 
     // Enable preprocessing record.