diff --git a/firmware/lib/event_log/event_log.h b/firmware/lib/event_log/event_log.h
index 470f45a..6f68978 100644
--- a/firmware/lib/event_log/event_log.h
+++ b/firmware/lib/event_log/event_log.h
@@ -19,6 +19,8 @@ enum RebootReason : uint8_t {
     REBOOT_FACTORY_RESET  = 2,
     REBOOT_OTA            = 3,
     REBOOT_WIFI_REPROV    = 4,
+    REBOOT_FATAL_CONFIG   = 5,
+    REBOOT_FATAL_CAMERA   = 6,
 };
 
 struct EventLogEntry {
diff --git a/firmware/src/main.cpp b/firmware/src/main.cpp
index 9767a87..6f5576c 100644
--- a/firmware/src/main.cpp
+++ b/firmware/src/main.cpp
@@ -169,6 +169,7 @@ void setup() {
 
     if (!config_load(g_cfg)) {
         Serial.println("FATAL: device_id/location_id/hmac_secret not provisioned");
+        event_log_write(EVT_REBOOT, REBOOT_FATAL_CONFIG, 0);
         while (true) { delay(500); led_set(!digitalRead(LED_PIN)); } // fast blink
     }
 
@@ -203,6 +204,7 @@ void setup() {
 
     if (!camera_init()) {
         Serial.println("FATAL: camera init failed");
+        event_log_write(EVT_REBOOT, REBOOT_FATAL_CAMERA, 0);
         while (true) delay(1000);
     }
 
diff --git a/server/heartbeat_diagnostics_stub.py b/server/heartbeat_diagnostics_stub.py
index ea2a714..30e7943 100644
--- a/server/heartbeat_diagnostics_stub.py
+++ b/server/heartbeat_diagnostics_stub.py
@@ -122,4 +122,6 @@ REBOOT_REASON_DECODER = {
     2: "FACTORY_RESET",
     3: "OTA",
     4: "WIFI_REPROV",
+    5: "FATAL_CONFIG",
+    6: "FATAL_CAMERA",
 }