diff --git a/packer/ui.go b/packer/ui.go
index 9ba44518b..cc4dd0a7e 100644
--- a/packer/ui.go
+++ b/packer/ui.go
@@ -350,6 +350,7 @@ func (u *MachineReadableUi) Machine(category string, args ...string) {
 			panic(err)
 		}
 	}
+	log.Printf("%d,%s,%s,%s\n", now.Unix(), target, category, argsString)
 }
 
 // TimestampedUi is a UI that wraps another UI implementation and