diff --git a/plat/rpi3/platform.mk b/plat/rpi3/platform.mk
index 559f316..5e76345 100644
--- a/plat/rpi3/platform.mk
+++ b/plat/rpi3/platform.mk
@@ -130,7 +130,9 @@
 $(eval $(call add_define,RPI3_BL32_RAM_LOCATION_ID))
 $(eval $(call add_define,RPI3_BL33_IN_AARCH32))
 $(eval $(call add_define,RPI3_DIRECT_LINUX_BOOT))
+ifdef RPI3_PRELOADED_DTB_BASE
 $(eval $(call add_define,RPI3_PRELOADED_DTB_BASE))
+endif
 $(eval $(call add_define,RPI3_RUNTIME_UART))
 $(eval $(call add_define,RPI3_USE_UEFI_MAP))