diff --git a/src/libs/time.js b/src/libs/time.js
index 1261621..eb7843c 100644
--- a/src/libs/time.js
+++ b/src/libs/time.js
@@ -19,12 +19,15 @@ const getAccumulatedSeconds = (newerTime, olderTime) => {
 }
 
 const formatSeconds = (total, includeHours = false) => {
-	const timeObj = createTimeObj(total)
+	const timeObj = createTimeObj(Math.abs(total))
+	let result = (total < 0) ? '-' : ''
 	if(includeHours) {
-		return `${timeObj.hours}:${timeObj.minutes.toString().padStart(2,'0')}:${timeObj.seconds.toString().padStart(2,'0')}`;
+		result += `${timeObj.hours}:${timeObj.minutes.toString().padStart(2,'0')}`
 	} else {
-		return `${timeObj.hours*60 + timeObj.minutes}:${timeObj.seconds.toString().padStart(2,'0')}`;
+		result += `${timeObj.hours*60 + timeObj.minutes}`
 	}
+	result += `:${timeObj.seconds.toString().padStart(2,'0')}`
+	return result
 }
 
 export { getHours, getMinutes, createTimeObj, getAccumulatedSeconds, formatSeconds }