diff --git a/builder/virtualbox/step_forward_ssh.go b/builder/virtualbox/step_forward_ssh.go
index 2caed9f36..a627939da 100644
--- a/builder/virtualbox/step_forward_ssh.go
+++ b/builder/virtualbox/step_forward_ssh.go
@@ -49,6 +49,9 @@ func (s *stepForwardSSH) Run(state map[string]interface{}) multistep.StepAction
 		return multistep.ActionHalt
 	}
 
+	// Save the port we're using so that future steps can use it
+	state["sshHostPort"] = sshHostPort
+
 	time.Sleep(15 * time.Second)
 	return multistep.ActionContinue
 }