diff --git a/src/device/input/parse/v01/server.go b/src/device/input/parse/v01/server.go
index 15062ee..107b262 100644
--- a/src/device/input/parse/v01/server.go
+++ b/src/device/input/parse/v01/server.go
@@ -207,7 +207,7 @@ func (v01 *V01) serveGMStatus(w io.Writer) {
 		}
 
 		lag := ""
-		if ms := time.Duration(v.Meta.LastLag) * time.Millisecond; ms > 0 && ms < time.Minute {
+		if ms := time.Duration(v.Meta.LastLag) * time.Millisecond; v.Meta.LastLag > 0 && ms < time.Minute {
 			lag = ms.String()
 		}