diff --git a/frame.go b/frame.go
index f694c9e97..dbc26541e 100644
--- a/frame.go
+++ b/frame.go
@@ -653,7 +653,7 @@ type FrameOptions struct {
 	TimeQuantum    TimeQuantum `json:"timeQuantum,omitempty"`
 }
 
-// Encode converts i into its internal representation.
+// Encode converts o into its internal representation.
 func (o *FrameOptions) Encode() *internal.FrameMeta {
 	return &internal.FrameMeta{
 		RowLabel:       o.RowLabel,