diff --git a/build/buildtools/modulerules b/build/buildtools/modulerules
index e400b0b..9aa8406 100644
--- a/build/buildtools/modulerules
+++ b/build/buildtools/modulerules
@@ -368,6 +368,7 @@ MAKEROM_FLAGS		?=
 MAKEROM_FLAGS		+= $(if $(NITRO_FINALROM),,-F)
 
 MAKEROM_DEFS		= -DNITROSDK_ROOT='$(ROOT)'			\
+			  -DTWLSDK_ROOT='$(TWL_ROOT)'		\
 			  -DTARGET_NAME='$(TARGET_NAME)'		\
 			  -DMAKEROM_ROMROOT='$(MAKEROM_ROMROOT)'	\
 			  -DMAKEROM_ROMFILES='$(MAKEROM_ROMFILES)'	\
diff --git a/tools/bin/rom_header.template.sbin b/tools/bin/rom_header.template.sbin
new file mode 100644
index 0000000..567e871
Binary files /dev/null and b/tools/bin/rom_header.template.sbin differ