diff --git a/Makefile b/Makefile
index ca2f2ed..82bd7aa 100644
--- a/Makefile
+++ b/Makefile
@@ -55,8 +55,8 @@ startup_stm32f103xe.s
 #######################################
 # binaries
 #######################################
-#PREFIX = arm-none-eabi-
-PREFIX = gcc-arm-none-eabi-7/bin/arm-none-eabi-
+PREFIX = arm-none-eabi-
+#PREFIX = gcc-arm-none-eabi-7/bin/arm-none-eabi-
 CC = $(PREFIX)gcc
 AS = $(PREFIX)gcc -x assembler-with-cpp
 CP = $(PREFIX)objcopy