diff --git a/ports/esp32s2/supervisor/port.c b/ports/esp32s2/supervisor/port.c
index 2aa01cb152..5cd6204405 100644
--- a/ports/esp32s2/supervisor/port.c
+++ b/ports/esp32s2/supervisor/port.c
@@ -30,6 +30,7 @@
 #include "supervisor/port.h"
 #include "boards/board.h"
 #include "modules/module.h"
+#include "py/runtime.h"
 
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"