diff --git a/builder/virtualbox/step_type_boot_command.go b/builder/virtualbox/step_type_boot_command.go
index e5fb442ea..c869cedad 100644
--- a/builder/virtualbox/step_type_boot_command.go
+++ b/builder/virtualbox/step_type_boot_command.go
@@ -99,7 +99,7 @@ func scancodes(message string) []string {
   //
   // Scancodes are recorded here in pairs. The first entry represents
   // the key press and the second entry represents the key release and is
-  // derived from the first by the addition of 0x81.
+  // derived from the first by the addition of 0x80.
 	special := make(map[string][]string)
 	special["<bs>"] = []string{"0e", "8e"}
 	special["<del>"] = []string{"53", "d3"}