diff --git a/models/running_parsers.go b/models/running_parsers.go
index 59d23380f..f9034e92c 100644
--- a/models/running_parsers.go
+++ b/models/running_parsers.go
@@ -75,7 +75,7 @@ func (r *RunningParser) Init() error {
 
 func (r *RunningParser) Parse(buf []byte, extra string) ([]telegraf.Metric, error) {
 	start := time.Now()
-	m, err := r.Parser.Parse(buf, "")
+	m, err := r.Parser.Parse(buf, extra)
 	elapsed := time.Since(start)
 	r.ParseTime.Incr(elapsed.Nanoseconds())
 	r.MetricsParsed.Incr(int64(len(m)))