diff --git a/libkbfs/interfaces.go b/libkbfs/interfaces.go
index <HASH>..<HASH> 100644
--- a/libkbfs/interfaces.go
+++ b/libkbfs/interfaces.go
@@ -1244,8 +1244,8 @@ type MDOps interface {
 	GetForTLF(ctx context.Context, id tlf.ID, lockBeforeGet *keybase1.LockID) (
 		ImmutableRootMetadata, error)
 
-	// GetForTLFByTime returns the earliest merged MD update with a
-	// server timestamp equal or greater to `serverTime`.
+	// GetForTLFByTime returns the newest merged MD update with a
+	// server timestamp less than or equal to `serverTime`.
 	GetForTLFByTime(ctx context.Context, id tlf.ID, serverTime time.Time) (
 		ImmutableRootMetadata, error)
interfaces: fix `GetForTLFByTime` comment

Suggested by songgao.

Issue: #<I>