diff --git a/src/test/pegtl/verify_file.hpp b/src/test/pegtl/verify_file.hpp
index 7f6aee32c..a1d4d3243 100644
--- a/src/test/pegtl/verify_file.hpp
+++ b/src/test/pegtl/verify_file.hpp
@@ -9,7 +9,7 @@
 
 #include "test.hpp"
 
-#if defined( _MSC_VER )
+#if defined( _MSC_VER ) && !defined( __MSYS__ )
 #define TAO_PEGTL_TEST_FILENAME u"src/test/pegtl/file_äöü𝄞_data.txt"
 #else
 #define TAO_PEGTL_TEST_FILENAME "src/test/pegtl/file_äöü𝄞_data.txt"