diff --git a/plat/nvidia/tegra/soc/t186/platform_t186.mk b/plat/nvidia/tegra/soc/t186/platform_t186.mk
index 85c924b..979dcb1 100644
--- a/plat/nvidia/tegra/soc/t186/platform_t186.mk
+++ b/plat/nvidia/tegra/soc/t186/platform_t186.mk
@@ -44,6 +44,9 @@
 ENABLE_SMMU_DEVICE			:= 1
 $(eval $(call add_define,ENABLE_SMMU_DEVICE))
 
+NUM_SMMU_DEVICES			:= 1
+$(eval $(call add_define,NUM_SMMU_DEVICES))
+
 RESET_TO_BL31				:= 1
 
 PROGRAMMABLE_RESET_ADDRESS		:= 1