diff --git a/compile.bash b/compile.bash
index 32ca4cd..c8c3c82 100644
--- a/compile.bash
+++ b/compile.bash
@@ -4,6 +4,6 @@ for file in ./*.el; do
     cask emacs -batch -L . --eval '(setq byte-compile-error-on-warn t)' -f batch-byte-compile "$file" || break
 done
 
-if ! [[ -n 'NO_REMOVE_ELC' ]]; then
+if [[ -z $NO_REMOVE_ELC ]]; then
     rm ./*.elc
 fi