diff --git a/smsapp/conversationssortfilterproxymodel.cpp b/smsapp/conversationssortfilterproxymodel.cpp
index bc7e375bd..9946946c8 100644
--- a/smsapp/conversationssortfilterproxymodel.cpp
+++ b/smsapp/conversationssortfilterproxymodel.cpp
@@ -58,7 +58,11 @@ bool ConversationsSortFilterProxyModel::filterAcceptsRow(int sourceRow, const QM
         const QList<ConversationAddress> addressList = sourceModel()->data(index, ConversationListModel::AddressesRole).value<QList<ConversationAddress>>();
         for (const ConversationAddress &address : addressList) {
             QString canonicalAddress = SmsHelper::canonicalizePhoneNumber(address.address());
+#if QT_VERSION_MAJOR < 6
+            if (canonicalAddress.contains(filterRegExp())) {
+#else
             if (canonicalAddress.contains(filterRegularExpression())) {
+#endif
                 return true;
             }
         }