diff --git a/board/Synology/common/Makefile b/board/Synology/common/Makefile
index f688b549063..87be53321ee 100644
--- a/board/Synology/common/Makefile
+++ b/board/Synology/common/Makefile
@@ -2,4 +2,4 @@
 #
 # Copyright (C) 2021 Phil Sutter <phil@nwl.cc>
 
-obj-$(SUPPORT_PASSING_ATAGS)	+= legacy.o
+obj-$(CONFIG_SUPPORT_PASSING_ATAGS)	+= legacy.o