diff --git a/install.sh b/install.sh
index 17d169a..f4c81f3 100755
--- a/install.sh
+++ b/install.sh
@@ -13,7 +13,7 @@ else
 fi
 # Not every platform has or needs sudo, gotta save them O(1)s...
 sudo_cmd=""
-((EUID)) && [[ -z "$ANDROID_ROOT" ]] && sudo_cmd="sudo"
+((EUID)) && [[ -z "${ANDROID_ROOT-}" ]] && sudo_cmd="sudo"
 
 ###############################
 #                             #