diff --git a/mov.go b/mov.go
index 829cb43..6923920 100644
--- a/mov.go
+++ b/mov.go
@@ -23,6 +23,9 @@ func Modified(file io.ReadSeeker) (time.Time, error) {
 	return m, err
 }
 
+// times seeks around in file and finds Created and Modified times.
+//
+// This was transcibed from http://stackoverflow.com/a/21395803
 func times(file io.ReadSeeker) (time.Time, time.Time, error) {
 	var c, m time.Time
 	var i int64