diff --git a/selfdrive/ui/qt/setup/setup.cc b/selfdrive/ui/qt/setup/setup.cc
index f1ffabf6c6..231c4c2ad6 100644
--- a/selfdrive/ui/qt/setup/setup.cc
+++ b/selfdrive/ui/qt/setup/setup.cc
@@ -29,6 +29,9 @@ void Setup::download(QString url) {
 
   auto version = util::read_file("/VERSION");
 
+  struct curl_slist *list = NULL;
+  list = curl_slist_append(list, ("X-openpilot-serial: " + Hardware::get_serial()).c_str());
+
   char tmpfile[] = "/tmp/installer_XXXXXX";
   FILE *fp = fdopen(mkstemp(tmpfile), "w");
 
@@ -38,6 +41,7 @@ void Setup::download(QString url) {
   curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
   curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
   curl_easy_setopt(curl, CURLOPT_USERAGENT, (USER_AGENT + version).c_str());
+  curl_easy_setopt(curl, CURLOPT_HTTPHEADER, list);
 
   int ret = curl_easy_perform(curl);
 
@@ -50,6 +54,7 @@ void Setup::download(QString url) {
     emit finished(false);
   }
 
+  curl_slist_free_all(list);
   curl_easy_cleanup(curl);
   fclose(fp);
 }
diff --git a/system/hardware/base.h b/system/hardware/base.h
index f6e0b42d73..6cfc1d8743 100644
--- a/system/hardware/base.h
+++ b/system/hardware/base.h
@@ -16,6 +16,8 @@ public:
   static int get_voltage() { return 0; };
   static int get_current() { return 0; };
 
+  static std::string get_serial() { return "cccccc"; }
+
   static void reboot() {}
   static void poweroff() {}
   static void set_brightness(int percent) {}
diff --git a/system/hardware/tici/hardware.h b/system/hardware/tici/hardware.h
index 521a257627..5f6fb2dc50 100644
--- a/system/hardware/tici/hardware.h
+++ b/system/hardware/tici/hardware.h
@@ -21,6 +21,23 @@ public:
   static int get_voltage() { return std::atoi(util::read_file("/sys/class/hwmon/hwmon1/in1_input").c_str()); };
   static int get_current() { return std::atoi(util::read_file("/sys/class/hwmon/hwmon1/curr1_input").c_str()); };
 
+  static std::string get_serial() {
+    static std::string serial("");
+    if (serial.empty()) {
+      std::ifstream stream("/proc/cmdline");
+      std::string cmdline;
+      std::getline(stream, cmdline);
+
+      auto start = cmdline.find("serialno=");
+      if (start == std::string::npos) {
+        serial = "cccccc";
+      } else {
+        auto end = cmdline.find(" ", start + 9);
+        serial = cmdline.substr(start + 9, end - start - 9);
+      }
+    }
+    return serial;
+  }
 
   static void reboot() { std::system("sudo reboot"); };
   static void poweroff() { std::system("sudo poweroff"); };