diff --git a/make/tools.mk b/make/tools.mk
index 17f8adb40..a5820aee6 100644
--- a/make/tools.mk
+++ b/make/tools.mk
@@ -8,7 +8,7 @@
 ###############################################################
 
 GCC_REQUIRED_VERSION ?= 8.2.1
-ARM_SDK_DIR ?= $(TOOLS_DIR)/gcc-arm-none-eabi-8-2018-q4-major1
+ARM_SDK_DIR ?= $(TOOLS_DIR)/gcc-arm-none-eabi-8-2018-q4-major
 
 .PHONY: arm_sdk_version