diff --git a/pam/internal/adapter/model.go b/pam/internal/adapter/model.go
index 7a41a582c4..003b0dc0ce 100644
--- a/pam/internal/adapter/model.go
+++ b/pam/internal/adapter/model.go
@@ -406,6 +406,8 @@ func (m uiModel) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 	cmds = append(cmds, m.updateClientModel(msg))
 
+	// Export last selected auth mode to the PAM environment.
+	m.pamMTx.PutEnv("AUTHD_AUTH_LAST_MODE=" + m.authModeSelectionModel.currentAuthModeSelectedID)
 	return m, tea.Batch(cmds...)
 }