diff --git a/dist-build/android-build.sh b/dist-build/android-build.sh
index b75af90f..19e837bb 100755
--- a/dist-build/android-build.sh
+++ b/dist-build/android-build.sh
@@ -11,7 +11,7 @@ if [ ! -f ./configure ]; then
 	exit 1
 fi
 
-if [[ -z $TARGET_ARCH ]] || [[ -z $HOST_COMPILER ]]; then
+if [ "x$TARGET_ARCH" = 'x' ] || [ "x$HOST_COMPILER" = 'x' ]; then
     echo "You shouldn't use android-build.sh directly, use android-[arch].sh instead"
     exit 1
 fi