diff --git a/tf_config/fvp-tspd-tbb-mbedtls-ecdsa-dualroot b/tf_config/fvp-tspd-tbb-mbedtls-ecdsa-dualroot
index 9015344..0da2312 100644
--- a/tf_config/fvp-tspd-tbb-mbedtls-ecdsa-dualroot
+++ b/tf_config/fvp-tspd-tbb-mbedtls-ecdsa-dualroot
@@ -10,3 +10,4 @@
 TF_MBEDTLS_KEY_ALG=rsa+ecdsa
 TRUSTED_BOARD_BOOT=1
 DEBUG=0
+FVP_TRUSTED_SRAM_SIZE=384