diff --git a/plat/arm/board/n1sdp/platform.mk b/plat/arm/board/n1sdp/platform.mk
index 8816670..f86d420 100644
--- a/plat/arm/board/n1sdp/platform.mk
+++ b/plat/arm/board/n1sdp/platform.mk
@@ -63,6 +63,9 @@
 # When building for systems with hardware-assisted coherency, there's no need to
 # use USE_COHERENT_MEM. Require that USE_COHERENT_MEM must be set to 0 too.
 USE_COHERENT_MEM			:=	0
+
+# Enable the flag since N1SDP has a system level cache
+NEOVERSE_N1_EXTERNAL_LLC		:=	1
 include plat/arm/common/arm_common.mk
 include plat/arm/css/common/css_common.mk
 include plat/arm/board/common/board_common.mk