diff --git a/dist/tools/buildsystem_sanity_check/check.sh b/dist/tools/buildsystem_sanity_check/check.sh
index 6fabde740f..ba9b88d97b 100755
--- a/dist/tools/buildsystem_sanity_check/check.sh
+++ b/dist/tools/buildsystem_sanity_check/check.sh
@@ -81,6 +81,8 @@ UNEXPORTED_VARIABLES+=('PORT_LINUX' 'PORT_DARWIN')
 UNEXPORTED_VARIABLES+=('PORT[ ?=:]' 'PORT$')
 
 EXPORTED_VARIABLES_ONLY_IN_VARS=()
+EXPORTED_VARIABLES_ONLY_IN_VARS+=('CPU_ARCH')
+EXPORTED_VARIABLES_ONLY_IN_VARS+=('CPU_FAM')
 check_not_exporting_variables() {
     local patterns=()
     local pathspec=()