diff --git a/tools/find-unused-css b/tools/find-unused-css
index 86c5b771f7..d474922c03 100755
--- a/tools/find-unused-css
+++ b/tools/find-unused-css
@@ -2,7 +2,7 @@
 # Hackish tool for attempting to find unused IDs / classes in our CSS
 
 for n in $(perl -lne 'print $1 while /[#.]([a-zA-Z0-9_-]+)/g' static/styles/zulip.css | sort -u); do
-    if [ $(git grep "$n" | grep -v '^static/styles/zulip.css' | wc -l) -eq 0 ]; then
-        echo $n
+    if [ "$(git grep "$n" | grep -cv '^static/styles/zulip.css')" -eq 0 ]; then
+        echo "$n"
     fi
 done