diff --git a/src/point_one/fusion_engine/messages/device.h b/src/point_one/fusion_engine/messages/device.h
index 568a9b2c..56c3e497 100644
--- a/src/point_one/fusion_engine/messages/device.h
+++ b/src/point_one/fusion_engine/messages/device.h
@@ -103,8 +103,6 @@ enum class DeviceType : uint8_t {
   SSR_LG69T = 6,
   /** Point One SSR client running on a desktop platform. */
   SSR_DESKTOP = 7,
-  /** Point One Uart to SPI prototype system (host to ST5635) */
-  P1_ST5635 = 8,
 };
 
 /**
@@ -133,8 +131,6 @@ P1_CONSTEXPR_FUNC const char* to_string(DeviceType val) {
       return "SSR_LG69T";
     case DeviceType::SSR_DESKTOP:
       return "SSR_DESKTOP";
-    case DeviceType::P1_ST5635:
-      return "P1_ST5635";
   }
   return "Unrecognized";
 }