diff --git a/shared/featureconfig/config.go b/shared/featureconfig/config.go
index 44e205597c..35db5c9976 100644
--- a/shared/featureconfig/config.go
+++ b/shared/featureconfig/config.go
@@ -86,8 +86,10 @@ func ConfigureBeaconChain(ctx *cli.Context) {
 		log.Warn("Enabled unsafe eth1 data vote cache")
 		cfg.EnableEth1DataVoteCache = true
 	}
-	if ctx.GlobalBool(InitSyncNoVerifyFlag.Name) {
-		log.Warn("Initial syncing without verifying block's contents")
+	if ctx.GlobalBool(initSyncVerifyEverythingFlag.Name) {
+		log.Warn("Initial syncing with verifying all block's content signatures.")
+		cfg.InitSyncNoVerify = false
+	} else {
 		cfg.InitSyncNoVerify = true
 	}
 	if ctx.GlobalBool(NewCacheFlag.Name) {
diff --git a/shared/featureconfig/flags.go b/shared/featureconfig/flags.go
index 91e6ef3907..82e9e220b3 100644
--- a/shared/featureconfig/flags.go
+++ b/shared/featureconfig/flags.go
@@ -45,11 +45,6 @@ var (
 		Name:  "enable-active-count-cache",
 		Usage: "Enable unsafe cache mechanism. See https://github.com/prysmaticlabs/prysm/issues/3106",
 	}
-	// InitSyncNoVerifyFlag enables the initial sync no verify configuration.
-	InitSyncNoVerifyFlag = cli.BoolFlag{
-		Name:  "init-sync-no-verify",
-		Usage: "Initial sync to finalized check point w/o verifying block's signature, RANDAO and attestation's aggregated signatures",
-	}
 	// NewCacheFlag enables the node to use the new caching scheme.
 	NewCacheFlag = cli.BoolFlag{
 		Name:  "new-cache",
@@ -81,6 +76,12 @@ var (
 		Name:  "prune-states",
 		Usage: "Prune epoch boundary states before last finalized check point",
 	}
+	initSyncVerifyEverythingFlag = cli.BoolFlag{
+		Name: "initial-sync-verify-all-signatures",
+		Usage: "Initial sync to finalized checkpoint with verifying block's signature, RANDAO " +
+			"and attestation's aggregated signatures. Without this flag, only the proposer " +
+			"signature is verified until the node reaches the end of the finalized chain.",
+	}
 )
 
 // Deprecated flags list.
@@ -112,6 +113,11 @@ var (
 		Usage:  deprecatedUsage,
 		Hidden: true,
 	}
+	deprecatedInitSyncNoVerifyFlag = cli.BoolFlag{
+		Name:   "init-sync-no-verify",
+		Usage:  deprecatedUsage,
+		Hidden: true,
+	}
 )
 
 var deprecatedFlags = []cli.Flag{
@@ -120,6 +126,7 @@ var deprecatedFlags = []cli.Flag{
 	deprecatedScatterFlag,
 	deprecatedPruneFinalizedStatesFlag,
 	deprecatedOptimizeProcessEpoch,
+	deprecatedInitSyncNoVerifyFlag,
 }
 
 // ValidatorFlags contains a list of all the feature flags that apply to the validator client.
@@ -134,7 +141,7 @@ var BeaconChainFlags = append(deprecatedFlags, []cli.Flag{
 	writeSSZStateTransitionsFlag,
 	EnableAttestationCacheFlag,
 	EnableEth1DataVoteCacheFlag,
-	InitSyncNoVerifyFlag,
+	initSyncVerifyEverythingFlag,
 	NewCacheFlag,
 	SkipBLSVerifyFlag,
 	enableBackupWebhookFlag,