diff --git a/cmd/thanos/compact.go b/cmd/thanos/compact.go
index 1a08135744..0396d7b5ff 100644
--- a/cmd/thanos/compact.go
+++ b/cmd/thanos/compact.go
@@ -86,7 +86,7 @@ func registerCompact(m map[string]setupFunc, app *kingpin.Application) {
 	objStoreConfig := regCommonObjStoreFlags(cmd, "", true)
 
 	consistencyDelay := modelDuration(cmd.Flag("consistency-delay", fmt.Sprintf("Minimum age of fresh (non-compacted) blocks before they are being processed. Malformed blocks older than the maximum of consistency-delay and %s will be removed.", compact.MinimumAgeForRemoval)).
-		Default("30m"))
+		Default("24h"))
 
 	retentionRaw := modelDuration(cmd.Flag("retention.resolution-raw", "How long to retain raw samples in bucket. 0d - disables this retention").Default("0d"))
 	retention5m := modelDuration(cmd.Flag("retention.resolution-5m", "How long to retain samples of resolution 1 (5 minutes) in bucket. 0d - disables this retention").Default("0d"))