diff --git a/plat/arm/board/fvp/fdts/fvp_tb_fw_config.dts b/plat/arm/board/fvp/fdts/fvp_tb_fw_config.dts
index 5c24f94..fb7e2c5 100644
--- a/plat/arm/board/fvp/fdts/fvp_tb_fw_config.dts
+++ b/plat/arm/board/fvp/fdts/fvp_tb_fw_config.dts
@@ -12,5 +12,7 @@
 		compatible = "arm,tb_fw";
 		hw_config_addr = <0x0 0x82000000>;
 		hw_config_max_size = <0x01000000>;
+		/* Disable authentication for development */
+		disable_auth = <0x0>;
 	};
 };