diff --git a/porting/npl/riot/include/syscfg/syscfg.h b/porting/npl/riot/include/syscfg/syscfg.h
index 85e7946a48..3b21486974 100644
--- a/porting/npl/riot/include/syscfg/syscfg.h
+++ b/porting/npl/riot/include/syscfg/syscfg.h
@@ -321,6 +321,8 @@
 #define MYNEWT_VAL_SOFT_PWM (0)
 #endif
 
+#undef MYNEWT_VAL_ARM_MPU
+
 #ifndef MYNEWT_VAL_HAL_ENABLE_SOFTWARE_BREAKPOINTS
 #define MYNEWT_VAL_HAL_ENABLE_SOFTWARE_BREAKPOINTS (1)
 #endif