diff --git a/boards/esp32-heltec-lora32-v2/include/board.h b/boards/esp32-heltec-lora32-v2/include/board.h
index 113769ff05..5c80a56cc6 100644
--- a/boards/esp32-heltec-lora32-v2/include/board.h
+++ b/boards/esp32-heltec-lora32-v2/include/board.h
@@ -55,6 +55,13 @@
  */
 #define BTN0_MODE       GPIO_IN
 
+/**
+ * @brief   Default interrupt flank definition for the button GPIO
+ */
+#ifndef BTN0_INT_FLANK
+#define BTN0_INT_FLANK  GPIO_FALLING
+#endif
+
 /**
  * @brief   Definition for compatibility with previous versions
  */