diff --git a/plat/arm/board/rdv1/platform.mk b/plat/arm/board/rdv1/platform.mk
index 2ffd139..1ae85de 100644
--- a/plat/arm/board/rdv1/platform.mk
+++ b/plat/arm/board/rdv1/platform.mk
@@ -58,3 +58,8 @@
 
 override CTX_INCLUDE_AARCH32_REGS	:= 0
 override ENABLE_AMU			:= 1
+
+ifneq ($(CSS_SGI_PLATFORM_VARIANT),0)
+ $(error "CSS_SGI_PLATFORM_VARIANT for RD-V1 should always be 0, \
+     currently set to ${CSS_SGI_PLATFORM_VARIANT}.")
+endif