diff --git a/blacklist.sh b/blacklist.sh
index 5e0447b..ff013ac 100755
--- a/blacklist.sh
+++ b/blacklist.sh
@@ -76,7 +76,7 @@ for url in $urls; do
     curl -v -s ${COMPRESS_OPT} -k "$url" >"${unsorted_blocklist}" 2>"${headers}"
 
     # this is required for blocklist.de that sends compressed content if asked for it or not
-    if grep -qi 'content-encoding: gzip' ${headers }; then
+    if grep -qi 'content-encoding: gzip' "${headers}"; then
         mv "${unsorted_blocklist}" "${unsorted_blocklist}.gz"
         gzip -d "${unsorted_blocklist}"
     fi