diff --git a/io/key/key.go b/io/key/key.go
index 3775a4c8..e22da449 100644
--- a/io/key/key.go
+++ b/io/key/key.go
@@ -64,7 +64,7 @@ type Range struct {
 }
 
 // Snippet represents a snippet of text content used for communicating between
-// an editor and an input method. Offset and Length are in runes.
+// an editor and an input method.
 type Snippet struct {
 	Range
 	Text string