diff --git a/ports/atmel-samd/boards/cp_sapling_m0_revb/mpconfigboard.mk b/ports/atmel-samd/boards/cp_sapling_m0_revb/mpconfigboard.mk
index 514fa40009..b46ff6069a 100644
--- a/ports/atmel-samd/boards/cp_sapling_m0_revb/mpconfigboard.mk
+++ b/ports/atmel-samd/boards/cp_sapling_m0_revb/mpconfigboard.mk
@@ -23,5 +23,6 @@ CFLAGS_INLINE_LIMIT = 35
 SUPEROPT_VM = 0
 endif
 ifeq ($(TRANSLATION), ja)
+RELEASE_NEEDS_CLEAN_BUILD = 1
 CFLAGS_INLINE_LIMIT = 35
 endif