diff --git a/internal/datacoord/compaction.go b/internal/datacoord/compaction.go
index d4202863d8..246b3e88a8 100644
--- a/internal/datacoord/compaction.go
+++ b/internal/datacoord/compaction.go
@@ -254,9 +254,9 @@ func (c *compactionPlanHandler) expireCompaction(ts Timestamp) error {
 }
 
 func (c *compactionPlanHandler) isTimeout(now Timestamp, start Timestamp, timeout int32) bool {
-	starttime, _ := tsoutil.ParseTS(start)
+	startTime, _ := tsoutil.ParseTS(start)
 	ts, _ := tsoutil.ParseTS(now)
-	return int32(ts.Sub(starttime).Seconds()) >= timeout
+	return int32(ts.Sub(startTime).Seconds()) >= timeout
 }
 
 // isFull return true if the task pool is full