diff --git a/src/pkg/exp/ebnf/parser.go b/src/pkg/exp/ebnf/parser.go
index dac5dd8339..b550c2b64f 100644
--- a/src/pkg/exp/ebnf/parser.go
+++ b/src/pkg/exp/ebnf/parser.go
@@ -187,5 +187,5 @@ func (p *parser) parse(filename string, src io.Reader) Grammar {
 func Parse(filename string, src io.Reader) (Grammar, os.Error) {
 	var p parser
 	grammar := p.parse(filename, src)
-	return grammar, p.errors.Error()
+	return grammar, p.errors.Err()
 }