diff --git a/dlls/jscript/cc_parser.y b/dlls/jscript/cc_parser.y
index 18c1cb1c38e..4bc6260f194 100644
--- a/dlls/jscript/cc_parser.y
+++ b/dlls/jscript/cc_parser.y
@@ -30,7 +30,7 @@ WINE_DEFAULT_DEBUG_CHANNEL(jscript);
 
 %lex-param { parser_ctx_t *ctx }
 %parse-param { parser_ctx_t *ctx }
-%pure-parser
+%define api.pure
 %start CCExpr
 
 %union {
diff --git a/dlls/jscript/parser.y b/dlls/jscript/parser.y
index 138b6f329f4..ca83b6fd15b 100644
--- a/dlls/jscript/parser.y
+++ b/dlls/jscript/parser.y
@@ -141,7 +141,7 @@ static source_elements_t *source_elements_add_statement(source_elements_t*,state
 
 %lex-param { parser_ctx_t *ctx }
 %parse-param { parser_ctx_t *ctx }
-%pure-parser
+%define api.pure
 %start Program
 
 %union {