diff --git a/src/runtime/interface.go b/src/runtime/interface.go
index 8718c140..b9813225 100644
--- a/src/runtime/interface.go
+++ b/src/runtime/interface.go
@@ -96,7 +96,7 @@ func interfaceTypeAssert(ok bool) {
 
 type structField struct {
 	typecode unsafe.Pointer // type of this struct field
-	data     *uint8         // pointer to byte array containing name, tag, and 'embedded' flag
+	data     *uint8         // pointer to byte array containing name, tag, varint-encoded offset, and some flags
 }
 
 // Pseudo function call used during a type assert. It is used during interface