diff --git a/src/reflect/type.go b/src/reflect/type.go
index 6c05aceccf1..4254c657d2d 100644
--- a/src/reflect/type.go
+++ b/src/reflect/type.go
@@ -172,6 +172,9 @@ type Type interface {
 
 	// FieldByName returns the struct field with the given name
 	// and a boolean indicating if the field was found.
+	// If the returned field is promoted from an embedded struct,
+	// then Offset in the returned StructField is the offset in
+	// the embedded struct.
 	FieldByName(name string) (StructField, bool)
 
 	// FieldByNameFunc returns the struct field with a name
@@ -186,6 +189,10 @@ type Type interface {
 	// and FieldByNameFunc returns no match.
 	// This behavior mirrors Go's handling of name lookup in
 	// structs containing embedded fields.
+	//
+	// If the returned field is promoted from an embedded struct,
+	// then Offset in the returned StructField is the offset in
+	// the embedded struct.
 	FieldByNameFunc(match func(string) bool) (StructField, bool)
 
 	// In returns the type of a function type's i'th input parameter.