diff --git a/src/protocols/LoRaWAN/LoRaWAN.cpp b/src/protocols/LoRaWAN/LoRaWAN.cpp
index bfe6d0a3..f0ca9268 100644
--- a/src/protocols/LoRaWAN/LoRaWAN.cpp
+++ b/src/protocols/LoRaWAN/LoRaWAN.cpp
@@ -1,5 +1,8 @@
 #include "LoRaWAN.h"
 #include <string.h>
+#if defined(ESP8266) || defined(ESP32)
+#include "esp_attr.h"
+#endif
 
 #if !RADIOLIB_EXCLUDE_LORAWAN