diff --git a/MAKEALL b/MAKEALL
index 91fa495..2737eab 100755
--- a/MAKEALL
+++ b/MAKEALL
@@ -664,7 +664,7 @@
 	export BUILD_DIR="${output_dir}"
 
 	target_arch=$(get_target_arch ${target})
-	eval cross_toolchain=\$CROSS_COMPILE_${target_arch^^}
+	eval cross_toolchain=\$CROSS_COMPILE_`echo $target_arch | tr '[:lower:]' '[:upper:]'`
 	if [ "${cross_toolchain}" ] ; then
 	    MAKE="make CROSS_COMPILE=${cross_toolchain}"
 	elif [ "${CROSS_COMPILE}" ] ; then