diff --git a/NEWS b/NEWS
index 4a30d06b..b01b2ea3 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,7 @@ GNU Bison NEWS
 
 * Noteworthy changes in release ?.? (????-??-??) [?]
 
+  Portability issues in the test suite and in C++ skeletons.
 
 * Noteworthy changes in release 3.7.90 (2021-08-13) [beta]
 
diff --git a/data/skeletons/variant.hh b/data/skeletons/variant.hh
index efc67a7d..e7177d9f 100644
--- a/data/skeletons/variant.hh
+++ b/data/skeletons/variant.hh
@@ -484,7 +484,9 @@ m4_define([_b4_symbol_constructor_define],
                               b4_locations_if([l]))[)
 #endif
       {]b4_parse_assert_if([[
+#if !defined _MSC_VER || defined __clang__
         ]b4_assert[ (]b4_tok_in($@)[);
+#endif
       ]])[}
 ]])])