diff --git a/src/parse.y b/src/parse.y
index 600cdb85c..c226a4e84 100644
--- a/src/parse.y
+++ b/src/parse.y
@@ -933,7 +933,7 @@ heredoc_end(parser_state *p)
 
 %}
 
-%pure_parser
+%pure-parser
 %parse-param {parser_state *p}
 %lex-param {parser_state *p}