diff --git a/APMrover2/version.cpp b/APMrover2/version.cpp
index 147c3de7af..68ce2f3619 100644
--- a/APMrover2/version.cpp
+++ b/APMrover2/version.cpp
@@ -36,10 +36,7 @@ const AP_FWVersion AP_FWVersion::fwver{
     .middleware_name = "PX4",
     .middleware_hash_str = PX4_GIT_VERSION,
 #endif
-#ifdef NUTTX_GIT_VERSION
-    .os_name = "NuttX",
-    .os_hash_str = NUTTX_GIT_VERSION,
-#elif defined(CHIBIOS_GIT_VERSION)
+#ifdef CHIBIOS_GIT_VERSION
     .middleware_name = nullptr,
     .middleware_hash_str = nullptr,
     .os_name = "ChibiOS",