diff --git a/plugins/parsers/registry.go b/plugins/parsers/registry.go
index 28ff30261..c662cf300 100644
--- a/plugins/parsers/registry.go
+++ b/plugins/parsers/registry.go
@@ -231,7 +231,6 @@ func newCSVParser(metricName string,
 		if len(runeStr) > 1 {
 			return nil, fmt.Errorf("csv_delimiter must be a single character, got: %s", delimiter)
 		}
-		delimiter = fmt.Sprintf("%v", runeStr[0])
 	}
 
 	if comment != "" {
@@ -239,7 +238,6 @@ func newCSVParser(metricName string,
 		if len(runeStr) > 1 {
 			return nil, fmt.Errorf("csv_delimiter must be a single character, got: %s", comment)
 		}
-		comment = fmt.Sprintf("%v", runeStr[0])
 	}
 
 	parser := &csv.Parser{