diff --git a/src/AsyncEventSource.h b/src/AsyncEventSource.h
index 49f65e85..ccfda95e 100644
--- a/src/AsyncEventSource.h
+++ b/src/AsyncEventSource.h
@@ -8,6 +8,11 @@
 
 #if defined(ESP32) || defined(LIBRETINY)
 #include <AsyncTCP.h>
+#ifdef LIBRETINY
+#ifdef round
+#undef round
+#endif
+#endif
 #include <mutex>
 #ifndef SSE_MAX_QUEUED_MESSAGES
 #define SSE_MAX_QUEUED_MESSAGES 32
diff --git a/src/AsyncWebSocket.h b/src/AsyncWebSocket.h
index 979c8be7..f93b0387 100644
--- a/src/AsyncWebSocket.h
+++ b/src/AsyncWebSocket.h
@@ -8,6 +8,11 @@
 
 #if defined(ESP32) || defined(LIBRETINY)
 #include <AsyncTCP.h>
+#ifdef LIBRETINY
+#ifdef round
+#undef round
+#endif
+#endif
 #include <mutex>
 #ifndef WS_MAX_QUEUED_MESSAGES
 #define WS_MAX_QUEUED_MESSAGES 32