diff --git a/src/Main/options.cxx b/src/Main/options.cxx
index 77cba345c..fe4b38361 100644
--- a/src/Main/options.cxx
+++ b/src/Main/options.cxx
@@ -334,6 +334,10 @@ private:
         return 0;
     }
     
+#ifdef _MSC_VER
+	#define strcasecmp stricmp
+#endif
+
     // recommended in Meyers, Effective STL when internationalization and embedded
     // NULLs aren't an issue.  Much faster than the STL or Boost lex versions.
     struct ciLessLibC : public std::binary_function<string, string, bool>