diff --git a/src/lib/adblock/adblockrule.cpp b/src/lib/adblock/adblockrule.cpp
index 59e24d18e..10ceac2f6 100644
--- a/src/lib/adblock/adblockrule.cpp
+++ b/src/lib/adblock/adblockrule.cpp
@@ -607,7 +607,7 @@ void AdBlockRule::parseDomains(const QString &domains, const QChar &separator)
 {
     const QStringList domainsList = domains.split(separator, Qt::SkipEmptyParts);
 
-    for (const QString domain : domainsList) {
+    for (const QString &domain : domainsList) {
         if (domain.isEmpty()) {
             continue;
         }