diff --git a/tf_config/fvp-tspd-tbb-mbedtls-tsp-dram b/tf_config/fvp-tspd-tbb-mbedtls-tsp-dram
index 866f62d..c789944 100644
--- a/tf_config/fvp-tspd-tbb-mbedtls-tsp-dram
+++ b/tf_config/fvp-tspd-tbb-mbedtls-tsp-dram
@@ -1,6 +1,7 @@
 ARM_ROTPK_LOCATION=devel_rsa
 ARM_TSP_RAM_LOCATION=dram
 CROSS_COMPILE=aarch64-none-elf-
+FVP_TRUSTED_SRAM_SIZE=384
 GENERATE_COT=1
 PLAT=fvp
 SPD=tspd