2 files changed, 2 insertions, 0 deletions
diff --git a/parse.y b/parse.y
index 09ba462124..9f6bda35ba 100644
--- a/parse.y
+++ b/parse.y
@@ -1014,6 +1014,7 @@ static int looking_at_eol_p(struct parser_params *p);
 
 %expect 0
 %define api.pure
+%define parse.error verbose
 %lex-param {struct parser_params *p}
 %parse-param {struct parser_params *p}
 %initial-action
diff --git a/tool/pure_parser.rb b/tool/pure_parser.rb
index e4aedfa81b..d07df681be 100755
--- a/tool/pure_parser.rb
+++ b/tool/pure_parser.rb
@@ -18,3 +18,4 @@ BEGIN {
   ARGV.push(file)
 }
 $_.sub!(/^%define\s+api\.pure/, '%pure-parser')
+$_.sub!(/^%define\s+.*/, '')