diff --git a/tf_config/fvp-tbb-mbedtls-tlkd b/tf_config/fvp-tbb-mbedtls-tlkd
index 1efdfad..9e38e18 100644
--- a/tf_config/fvp-tbb-mbedtls-tlkd
+++ b/tf_config/fvp-tbb-mbedtls-tlkd
@@ -1,5 +1,6 @@
 ARM_ROTPK_LOCATION=devel_rsa
 CROSS_COMPILE=aarch64-none-elf-
+ENABLE_FEAT_D128=0
 FVP_TRUSTED_SRAM_SIZE=384
 GENERATE_COT=1
 PLAT=fvp
diff --git a/tf_config/fvp-tbb-psa-mbedtls-tlkd b/tf_config/fvp-tbb-psa-mbedtls-tlkd
index d081f87..7571a73 100644
--- a/tf_config/fvp-tbb-psa-mbedtls-tlkd
+++ b/tf_config/fvp-tbb-psa-mbedtls-tlkd
@@ -1,5 +1,6 @@
 ARM_ROTPK_LOCATION=devel_rsa
 CROSS_COMPILE=aarch64-none-elf-
+ENABLE_FEAT_D128=0
 FVP_TRUSTED_SRAM_SIZE=384
 GENERATE_COT=1
 PLAT=fvp
diff --git a/tf_config/tegra-t210-tlkd b/tf_config/tegra-t210-tlkd
index b3d264b..43dd4a4 100644
--- a/tf_config/tegra-t210-tlkd
+++ b/tf_config/tegra-t210-tlkd
@@ -1,4 +1,5 @@
 CROSS_COMPILE=aarch64-none-elf-
+ENABLE_FEAT_D128=0
 PLAT=tegra
 SPD=tlkd
 TARGET_SOC=t210