diff --git a/server/start.go b/server/start.go
index 53f266a49537..983153d4164e 100644
--- a/server/start.go
+++ b/server/start.go
@@ -47,14 +47,14 @@ const (
 	FlagTrace              = "trace"
 	FlagInvCheckPeriod     = "inv-check-period"
 
-	FlagPruning           = "pruning"
-	FlagPruningKeepRecent = "pruning-keep-recent"
-	FlagPruningKeepEvery  = "pruning-keep-every"
-	FlagPruningInterval   = "pruning-interval"
-	FlagIndexEvents       = "index-events"
-	FlagMinRetainBlocks   = "min-retain-blocks"
-	FlagIAVLCacheSize     = "iavl-cache-size"
-	FlagIAVLFastNode      = "iavl-disable-fastnode"
+	FlagPruning             = "pruning"
+	FlagPruningKeepRecent   = "pruning-keep-recent"
+	FlagPruningKeepEvery    = "pruning-keep-every"
+	FlagPruningInterval     = "pruning-interval"
+	FlagIndexEvents         = "index-events"
+	FlagMinRetainBlocks     = "min-retain-blocks"
+	FlagIAVLCacheSize       = "iavl-cache-size"
+	FlagDisableIAVLFastNode = "iavl-disable-fastnode"
 
 	// state sync-related flags
 	FlagStateSyncSnapshotInterval   = "state-sync.snapshot-interval"
@@ -165,7 +165,7 @@ is performed. Note, when enabled, gRPC will also be automatically enabled.
 	cmd.Flags().Uint64(FlagStateSyncSnapshotInterval, 0, "State sync snapshot interval")
 	cmd.Flags().Uint32(FlagStateSyncSnapshotKeepRecent, 2, "State sync snapshot to keep")
 
-	cmd.Flags().Bool(FlagIAVLFastNode, true, "Enable fast node for IAVL tree")
+	cmd.Flags().Bool(FlagDisableIAVLFastNode, true, "Disable fast node for IAVL tree")
 
 	// add support for all Tendermint-specific command line options
 	tcmd.AddNodeFlags(cmd)
diff --git a/simapp/simd/cmd/root.go b/simapp/simd/cmd/root.go
index 9f8660a27f54..122569e79af0 100644
--- a/simapp/simd/cmd/root.go
+++ b/simapp/simd/cmd/root.go
@@ -276,7 +276,7 @@ func (a appCreator) newApp(logger log.Logger, db dbm.DB, traceStore io.Writer, a
 		baseapp.SetSnapshotInterval(cast.ToUint64(appOpts.Get(server.FlagStateSyncSnapshotInterval))),
 		baseapp.SetSnapshotKeepRecent(cast.ToUint32(appOpts.Get(server.FlagStateSyncSnapshotKeepRecent))),
 		baseapp.SetIAVLCacheSize(cast.ToInt(appOpts.Get(server.FlagIAVLCacheSize))),
-		baseapp.SetIAVLDisableFastNode(cast.ToBool(appOpts.Get(server.FlagIAVLFastNode))),
+		baseapp.SetIAVLDisableFastNode(cast.ToBool(appOpts.Get(server.FlagDisableIAVLFastNode))),
 	)
 }