diff --git a/selfdrive/ui/qt/home.cc b/selfdrive/ui/qt/home.cc
index b674d39fbd..f5eab4664e 100644
--- a/selfdrive/ui/qt/home.cc
+++ b/selfdrive/ui/qt/home.cc
@@ -158,8 +158,8 @@ OffroadHome::OffroadHome(QWidget* parent) : QFrame(parent) {
     left_widget->setStyleSheet("border-radius: 10px;");
 
     left_widget->setCurrentIndex(uiState()->primeType() ? 0 : 1);
-    connect(uiState(), &UIState::primeTypeChanged, [=](int prime_type) {
-      left_widget->setCurrentIndex(prime_type ? 0 : 1);
+    connect(uiState(), &UIState::primeTypeChanged, [=](PrimeType prime_type) {
+      left_widget->setCurrentIndex((prime_type != PrimeType::NONE) ? 0 : 1);
     });
 
     home_layout->addWidget(left_widget, 1);
diff --git a/selfdrive/ui/qt/offroad/networking.cc b/selfdrive/ui/qt/offroad/networking.cc
index 628a92fb58..0a5c07af70 100644
--- a/selfdrive/ui/qt/offroad/networking.cc
+++ b/selfdrive/ui/qt/offroad/networking.cc
@@ -10,7 +10,6 @@
 #include "selfdrive/ui/qt/qt_window.h"
 #include "selfdrive/ui/qt/util.h"
 #include "selfdrive/ui/qt/widgets/controls.h"
-#include "selfdrive/ui/qt/widgets/prime.h"
 #include "selfdrive/ui/qt/widgets/scrollview.h"
 
 
@@ -184,7 +183,7 @@ AdvancedNetworking::AdvancedNetworking(QWidget* parent, WifiManager* wifi): QWid
   // Set initial config
   wifi->updateGsmSettings(roamingEnabled, QString::fromStdString(params.get("GsmApn")), metered);
 
-  connect(uiState(), &UIState::primeTypeChanged, this, [=](int prime_type) {
+  connect(uiState(), &UIState::primeTypeChanged, this, [=](PrimeType prime_type) {
     bool gsmVisible = prime_type == PrimeType::NONE || prime_type == PrimeType::LITE;
     roamingToggle->setVisible(gsmVisible);
     editApnButton->setVisible(gsmVisible);
diff --git a/selfdrive/ui/qt/widgets/prime.cc b/selfdrive/ui/qt/widgets/prime.cc
index afc6bd898e..57d9d87a64 100644
--- a/selfdrive/ui/qt/widgets/prime.cc
+++ b/selfdrive/ui/qt/widgets/prime.cc
@@ -269,7 +269,7 @@ void SetupWidget::replyFinished(const QString &response, bool success) {
   }
 
   QJsonObject json = doc.object();
-  int prime_type = json["prime_type"].toInt();
+  PrimeType prime_type = static_cast<PrimeType>(json["prime_type"].toInt());
   uiState()->setPrimeType(prime_type);
 
   if (!json["is_paired"].toBool()) {
diff --git a/selfdrive/ui/qt/widgets/prime.h b/selfdrive/ui/qt/widgets/prime.h
index b41bab1695..227a0f31c1 100644
--- a/selfdrive/ui/qt/widgets/prime.h
+++ b/selfdrive/ui/qt/widgets/prime.h
@@ -7,15 +7,6 @@
 
 #include "selfdrive/ui/qt/widgets/input.h"
 
-enum PrimeType {
-  NONE = 0,
-  MAGENTA = 1,
-  LITE = 2,
-  BLUE = 3,
-  MAGENTA_NEW = 4,
-};
-
-
 // pairing QR code
 class PairingQRWidget : public QWidget {
   Q_OBJECT
diff --git a/selfdrive/ui/ui.cc b/selfdrive/ui/ui.cc
index 26e8464a61..7b12d54888 100644
--- a/selfdrive/ui/ui.cc
+++ b/selfdrive/ui/ui.cc
@@ -245,8 +245,11 @@ UIState::UIState(QObject *parent) : QObject(parent) {
   });
 
   Params params;
-  prime_type = std::atoi(params.get("PrimeType").c_str());
   language = QString::fromStdString(params.get("LanguageSetting"));
+  auto prime_value = params.get("PrimeType");
+  if (!prime_value.empty()) {
+    prime_type = static_cast<PrimeType>(std::atoi(prime_value.c_str()));
+  }
 
   // update timer
   timer = new QTimer(this);
@@ -265,7 +268,7 @@ void UIState::update() {
   emit uiUpdate(*this);
 }
 
-void UIState::setPrimeType(int type) {
+void UIState::setPrimeType(PrimeType type) {
   if (type != prime_type) {
     prime_type = type;
     Params().put("PrimeType", std::to_string(prime_type));
diff --git a/selfdrive/ui/ui.h b/selfdrive/ui/ui.h
index 82f65d128f..cac8995278 100644
--- a/selfdrive/ui/ui.h
+++ b/selfdrive/ui/ui.h
@@ -96,6 +96,15 @@ typedef enum UIStatus {
   STATUS_ENGAGED,
 } UIStatus;
 
+enum PrimeType {
+  UNKNOWN = -1,
+  NONE = 0,
+  MAGENTA = 1,
+  LITE = 2,
+  BLUE = 3,
+  MAGENTA_NEW = 4,
+};
+
 const QColor bg_colors [] = {
   [STATUS_DISENGAGED] = QColor(0x17, 0x33, 0x49, 0xc8),
   [STATUS_OVERRIDE] = QColor(0x91, 0x9b, 0x95, 0xf1),
@@ -153,8 +162,8 @@ public:
     return scene.started && (*sm)["controlsState"].getControlsState().getEnabled();
   }
 
-  void setPrimeType(int type);
-  inline int primeType() const { return prime_type; }
+  void setPrimeType(PrimeType type);
+  inline PrimeType primeType() const { return prime_type; }
 
   int fb_w = 0, fb_h = 0;
 
@@ -170,7 +179,7 @@ public:
 signals:
   void uiUpdate(const UIState &s);
   void offroadTransition(bool offroad);
-  void primeTypeChanged(int prime_type);
+  void primeTypeChanged(PrimeType prime_type);
 
 private slots:
   void update();
@@ -178,7 +187,7 @@ private slots:
 private:
   QTimer *timer;
   bool started_prev = false;
-  int prime_type = -1;
+  PrimeType prime_type = PrimeType::UNKNOWN;
 };
 
 UIState *uiState();