diff --git a/ports/samd/mcu/samd21/mpconfigmcu.h b/ports/samd/mcu/samd21/mpconfigmcu.h
index 8e4071b64971..fdad3fee4a71 100644
--- a/ports/samd/mcu/samd21/mpconfigmcu.h
+++ b/ports/samd/mcu/samd21/mpconfigmcu.h
@@ -16,6 +16,7 @@
 
 // Selected extensions beyond the basic features set.
 #define MICROPY_ENABLE_FINALISER        (1)
+#define MICROPY_STACK_CHECK             (1)
 #define MICROPY_KBD_EXCEPTION           (1)
 #define MICROPY_HELPER_REPL             (1)
 #define MICROPY_REPL_AUTO_INDENT        (1)