diff --git a/plat/brcm/board/common/board_common.mk b/plat/brcm/board/common/board_common.mk
index c0d8711..24a27ed 100644
--- a/plat/brcm/board/common/board_common.mk
+++ b/plat/brcm/board/common/board_common.mk
@@ -214,8 +214,8 @@
 endif
 
 # Include mbedtls if it can be located
-MBEDTLS_DIR := mbedtls
-MBEDTLS_CHECK := $(shell find ${MBEDTLS_DIR}/include -name '${MBEDTLS_DIR}')
+MBEDTLS_DIR ?= mbedtls
+MBEDTLS_CHECK := $(shell find ${MBEDTLS_DIR}/include -name '$(notdir ${MBEDTLS_DIR})')
 
 ifneq (${MBEDTLS_CHECK},)
 $(info Found mbedTLS at ${MBEDTLS_DIR})