diff --git a/plat/arm/board/rdn1edge/platform.mk b/plat/arm/board/rdn1edge/platform.mk
index 95753aafc..d8d12937a 100644
--- a/plat/arm/board/rdn1edge/platform.mk
+++ b/plat/arm/board/rdn1edge/platform.mk
@@ -73,3 +73,6 @@ ifneq ($(CSS_SGI_PLATFORM_VARIANT),0)
 endif
 
 override CTX_INCLUDE_AARCH32_REGS	:= 0
+
+# Enable the flag since RD-N1-EDGE has a system level cache
+NEOVERSE_Nx_EXTERNAL_LLC		:=	1
diff --git a/plat/arm/board/rdn2/platform.mk b/plat/arm/board/rdn2/platform.mk
index ef8f3d477..2384d8469 100644
--- a/plat/arm/board/rdn2/platform.mk
+++ b/plat/arm/board/rdn2/platform.mk
@@ -95,3 +95,6 @@ $(eval $(call TOOL_ADD_PAYLOAD,${NT_FW_CONFIG},--nt-fw-config))
 
 override CTX_INCLUDE_AARCH32_REGS	:= 0
 override ENABLE_FEAT_AMU		:= 1
+
+# Enable the flag since RD-N2 has a system level cache
+NEOVERSE_Nx_EXTERNAL_LLC		:=	1
diff --git a/plat/arm/board/rdv1/platform.mk b/plat/arm/board/rdv1/platform.mk
index a5fba6717..0b059b5e8 100644
--- a/plat/arm/board/rdv1/platform.mk
+++ b/plat/arm/board/rdv1/platform.mk
@@ -63,3 +63,6 @@ ifneq ($(CSS_SGI_PLATFORM_VARIANT),0)
  $(error "CSS_SGI_PLATFORM_VARIANT for RD-V1 should always be 0, \
      currently set to ${CSS_SGI_PLATFORM_VARIANT}.")
 endif
+
+# Enable the flag since RD-V1 has a system level cache
+NEOVERSE_Nx_EXTERNAL_LLC		:=	1
diff --git a/plat/arm/board/rdv1mc/platform.mk b/plat/arm/board/rdv1mc/platform.mk
index 92f7c101f..176e0efff 100644
--- a/plat/arm/board/rdv1mc/platform.mk
+++ b/plat/arm/board/rdv1mc/platform.mk
@@ -74,3 +74,6 @@ ifneq ($(CSS_SGI_PLATFORM_VARIANT),0)
  $(error "CSS_SGI_PLATFORM_VARIANT for RD-V1-MC should always be 0, \
      currently set to ${CSS_SGI_PLATFORM_VARIANT}.")
 endif
+
+# Enable the flag since RD-V1-MC has a system level cache
+NEOVERSE_Nx_EXTERNAL_LLC		:=	1