diff --git a/tool/metrics/Makefile b/tool/metrics/Makefile
index de1be08aa..cb7e5834f 100644
--- a/tool/metrics/Makefile
+++ b/tool/metrics/Makefile
@@ -1,4 +1,4 @@
-C_HEADERS    ?= /Projects/c_headers/include/
+C_HEADERS    ?= ~/Projects/c_headers/include/
 BTSTACK_ROOT ?= ../..
 
 VPATH=${BTSTACK_ROOT}/src
@@ -16,13 +16,14 @@ SRC_FILES=$(wildcard ${BTSTACK_ROOT}/src/*.c)
 SRC_BLE_FILES=$(wildcard ${BTSTACK_ROOT}/src/ble/*.c)
 SRC_BLE_GATT_FILES_FILES=$(wildcard ${BTSTACK_ROOT}/src/ble/gatt-service/*.c)
 SRC_CLASSIC_FILES=$(wildcard ${BTSTACK_ROOT}/src/classic/*.c)
-
-SRCS = ${SRC_FILES} ${SRC_BLE_FILES} ${SRC_BLE_GATT_SERVICE_FILES} ${SRC_CLASSIC_FILES}
+SRC_3RD_RIJNDAEL=${BTSTACK_ROOT}/3rd-party/rijndael/rijndael.c
+SRC_3RD_UECC=${BTSTACK_ROOT}/3rd-party/micro-ecc/uECC.c
+SRCS = ${SRC_FILES} ${SRC_BLE_FILES} ${SRC_BLE_GATT_SERVICE_FILES} ${SRC_CLASSIC_FILES} ${SRC_3RD_RIJNDAEL} ${SRC_3RD_UECC}
 
 all: metrics.md metrics.html
 
 metrics.tsv: ${SRCS}
-	ccsm --disable-file --disable-global --exclude-std-headers --exclude-file=.h$$ --output-format=tsv --output-metrics=HIS_.* $^ -- -isystem ${C_HEADERS}/c90 -isystem ${C_HEADERS}/c99 ${INCLUDES} > $@
+	ccsm --disable-file --disable-global --exclude-std-headers --exclude-file=.h$$ --output-format=tsv --output-metrics=HIS_.* $^ -- -DuECC_NO_DEFAULT_RNG -isystem ${C_HEADERS}/c90 -isystem ${C_HEADERS}/c99 ${INCLUDES} > $@
 
 metrics.md: metrics.tsv metrics-ccsm.py
 	./metrics-ccsm.py > metrics.md