diff --git a/software/firmware/source/libraries/WiFiWebServer/src/WiFiWebServer.hpp b/software/firmware/source/libraries/WiFiWebServer/src/WiFiWebServer.hpp
index cde6f93c2..6c0f54dae 100644
--- a/software/firmware/source/libraries/WiFiWebServer/src/WiFiWebServer.hpp
+++ b/software/firmware/source/libraries/WiFiWebServer/src/WiFiWebServer.hpp
@@ -200,6 +200,12 @@
 
 ////////////////////////////////////////
 
+#elif defined(ARDUINO_ARCH_RENESAS_UNO)
+
+  #if (_WIFI_LOGLEVEL_ > 2)
+    #warning Use Uno R4 from WiFiWebServer
+  #endif
+
 #else
 
   #warning Unknown or unsupported board