diff --git a/plat/arm/board/rdn2/include/platform_def.h b/plat/arm/board/rdn2/include/platform_def.h
index 3f753f7..30a0c5c 100644
--- a/plat/arm/board/rdn2/include/platform_def.h
+++ b/plat/arm/board/rdn2/include/platform_def.h
@@ -11,7 +11,12 @@
 
 #include <sgi_soc_platform_def_v2.h>
 
+#if (CSS_SGI_PLATFORM_VARIANT == 1)
+#define PLAT_ARM_CLUSTER_COUNT		U(8)
+#else
 #define PLAT_ARM_CLUSTER_COUNT		U(16)
+#endif
+
 #define CSS_SGI_MAX_CPUS_PER_CLUSTER	U(1)
 #define CSS_SGI_MAX_PE_PER_CPU		U(1)
 
@@ -26,7 +31,12 @@
 #define PLAT_ARM_TZC_FILTERS		TZC_400_REGION_ATTR_FILTER_BIT(0)
 
 #define TZC400_OFFSET			UL(0x1000000)
+
+#if (CSS_SGI_PLATFORM_VARIANT == 1)
+#define TZC400_COUNT			U(2)
+#else
 #define TZC400_COUNT			U(8)
+#endif
 
 #define TZC400_BASE(n)			(PLAT_ARM_TZC_BASE + \
 						(n * TZC400_OFFSET))
@@ -60,6 +70,11 @@
 /* GIC related constants */
 #define PLAT_ARM_GICD_BASE		UL(0x30000000)
 #define PLAT_ARM_GICC_BASE		UL(0x2C000000)
+
+#if (CSS_SGI_PLATFORM_VARIANT == 1)
+#define PLAT_ARM_GICR_BASE		UL(0x30100000)
+#else
 #define PLAT_ARM_GICR_BASE		UL(0x301C0000)
+#endif
 
 #endif /* PLATFORM_DEF_H */