diff --git a/cpu/arm7_common/Makefile.include b/cpu/arm7_common/Makefile.include
index 1c3447e340..1d7edd59b4 100644
--- a/cpu/arm7_common/Makefile.include
+++ b/cpu/arm7_common/Makefile.include
@@ -1,5 +1,5 @@
 # Target architecture for the build. Use arm-none-eabi if you are unsure.
-export TARGET_ARCH ?= arm-none-eabi
+TARGET_ARCH ?= arm-none-eabi
 
 INCLUDES += -I$(RIOTBASE)/cpu/arm7_common/include/