diff --git a/template/bison/yacc.c b/template/bison/yacc.c
index 2d6753c2..353fb9de 100644
--- a/template/bison/yacc.c
+++ b/template/bison/yacc.c
@@ -1475,7 +1475,11 @@ int yychar;
 /* The semantic value of the lookahead symbol.  */
 /* Default value used for initialization, for pacifying older GCCs
    or non-GCC compilers.  */
+#ifdef __cplusplus
+static const YYSTYPE yyval_default = YY_INITIAL_VALUE(YYSTYPE());
+#else
 YY_INITIAL_VALUE (static const YYSTYPE yyval_default;)
+#endif
 YYSTYPE yylval YY_INITIAL_VALUE (= yyval_default);
 
 /* Location data for the lookahead symbol.  */