diff --git a/q b/q
index 8ecbc07..764a704 100755
--- a/q
+++ b/q
@@ -28,7 +28,7 @@
 
 set -e
 
-if [[ -z "Q_SCRIPT_DIR" ]]; then
+if [[ -z "$Q_SCRIPT_DIR" ]]; then
 	Q_SCRIPT_DIR=~/.config/q.sh
 fi