diff --git a/expfmt/text_parse.go b/expfmt/text_parse.go
index 84be0643..eb03080a 100644
--- a/expfmt/text_parse.go
+++ b/expfmt/text_parse.go
@@ -144,7 +144,9 @@ func (p *TextParser) startOfLine() stateFn {
 	if p.skipBlankTab(); p.err != nil {
 		// End of input reached. This is the only case where
 		// that is not an error but a signal that we are done.
-		p.err = nil
+		if p.err == io.EOF {
+			p.err = nil
+		}
 		return nil
 	}
 	switch p.currentByte {