diff --git a/model/textparse/interface.go b/model/textparse/interface.go
index ef05f46b7..236efcfe0 100644
--- a/model/textparse/interface.go
+++ b/model/textparse/interface.go
@@ -80,7 +80,7 @@ type Parser interface {
 //
 // This function always returns a valid parser, but might additionally
 // return an error if the content type cannot be parsed.
-func New(b []byte, contentType string, parseClassicHistograms bool, skipOMSeries bool, st *labels.SymbolTable) (Parser, error) {
+func New(b []byte, contentType string, parseClassicHistograms, skipOMSeries bool, st *labels.SymbolTable) (Parser, error) {
 	if contentType == "" {
 		return NewPromParser(b, st), nil
 	}