diff --git a/bin/detect b/bin/detect
index 3877e6c..2195331 100755
--- a/bin/detect
+++ b/bin/detect
@@ -3,7 +3,7 @@
 set -eo pipefail; [[ $TRACE ]] && set -x
 
 # Exit early if app is clearly not an nginx app
-if [[ ! -f $1/.static ]]; then
+if [[ ! -f "$1/.static" ]]; then
   exit 1
 fi