diff --git a/cmd/syncthing/usage_report.go b/cmd/syncthing/usage_report.go
index aa5ea6a0..3b6219a8 100644
--- a/cmd/syncthing/usage_report.go
+++ b/cmd/syncthing/usage_report.go
@@ -181,7 +181,7 @@ func reportData(cfg configIntf, m modelIntf, connectionsService connectionsIntf,
 	res["upgradeAllowedPre"] = !(upgrade.DisabledByCompilation || noUpgradeFromEnv) && opts.AutoUpgradeIntervalH > 0 && opts.UpgradeToPreReleases
 
 	if version >= 3 {
-		res["uptime"] = time.Now().Sub(startTime).Seconds()
+		res["uptime"] = int(time.Now().Sub(startTime).Seconds())
 		res["natType"] = connectionsService.NATType()
 	}