diff --git a/Makefile b/Makefile
index de44485..a13ab04 100644
--- a/Makefile
+++ b/Makefile
@@ -54,11 +54,13 @@ ASM_SOURCES = \
 #######################################
 # binaries
 #######################################
-CC = arm-none-eabi-gcc
-AS = arm-none-eabi-gcc -x assembler-with-cpp
-CP = arm-none-eabi-objcopy
-AR = arm-none-eabi-ar
-SZ = arm-none-eabi-size
+
+TOOLCHAIN=/mnt/wd/toolchain/gcc-arm-none-eabi-6-2017-q1-update/install-native/bin
+CC = ${TOOLCHAIN}/arm-none-eabi-gcc
+AS = ${TOOLCHAIN}/arm-none-eabi-gcc -x assembler-with-cpp
+CP = ${TOOLCHAIN}/arm-none-eabi-objcopy
+AR = ${TOOLCHAIN}/arm-none-eabi-ar
+SZ = ${TOOLCHAIN}/arm-none-eabi-size
 HEX = $(CP) -O ihex
 BIN = $(CP) -O binary -S