diff --git a/tools/cert_create/Makefile b/tools/cert_create/Makefile
index c3c8bcf..77d2007 100644
--- a/tools/cert_create/Makefile
+++ b/tools/cert_create/Makefile
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
+# Copyright (c) 2015-2021, ARM Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -16,6 +16,12 @@
 include ${MAKE_HELPERS_DIRECTORY}build_macros.mk
 include ${MAKE_HELPERS_DIRECTORY}build_env.mk
 
+ifneq (${PLAT},none)
+TF_PLATFORM_ROOT	:=	../../plat/
+include ${MAKE_HELPERS_DIRECTORY}plat_helpers.mk
+PLAT_CERT_CREATE_HELPER_MK := ${PLAT_DIR}/cert_create_tbbr.mk
+endif
+
 # Common source files.
 OBJECTS := src/cert.o \
            src/cmd_opt.o \
@@ -33,6 +39,10 @@
   $(error Unknown chain of trust ${COT})
 endif
 
+ifneq (,$(wildcard ${PLAT_CERT_CREATE_HELPER_MK}))
+include ${PLAT_CERT_CREATE_HELPER_MK}
+endif
+
 HOSTCCFLAGS := -Wall -std=c99
 
 ifeq (${DEBUG},1)
@@ -51,7 +61,7 @@
 
 # Make soft links and include from local directory otherwise wrong headers
 # could get pulled in from firmware tree.
-INC_DIR := -I ./include -I ${PLAT_INCLUDE} -I ${OPENSSL_DIR}/include
+INC_DIR += -I ./include -I ${PLAT_INCLUDE} -I ${OPENSSL_DIR}/include
 LIB_DIR := -L ${OPENSSL_DIR}/lib
 LIB := -lssl -lcrypto