diff --git a/mvcc/kvstore_compaction.go b/mvcc/kvstore_compaction.go
index 1726490c1..082a33f0e 100644
--- a/mvcc/kvstore_compaction.go
+++ b/mvcc/kvstore_compaction.go
@@ -21,7 +21,7 @@ import (
 
 func (s *store) scheduleCompaction(compactMainRev int64, keep map[revision]struct{}) bool {
 	totalStart := time.Now()
-	defer dbCompactionTotalDurations.Observe(float64(time.Since(totalStart) / time.Millisecond))
+	defer func() { dbCompactionTotalDurations.Observe(float64(time.Since(totalStart) / time.Millisecond)) }()
 	keyCompactions := 0
 	defer func() { dbCompactionKeysCounter.Add(float64(keyCompactions)) }()