diff --git a/src/base/http/server.cpp b/src/base/http/server.cpp
index 26c56b8b3..f89ffa90d 100644
--- a/src/base/http/server.cpp
+++ b/src/base/http/server.cpp
@@ -126,7 +126,7 @@ bool Server::setupHttps(const QByteArray &certificates, const QByteArray &key)
 {
     QSslKey sslKey(key, QSsl::Rsa);
     if (sslKey.isNull())
-#ifdef QBT_USES_QT5
+#if QT_VERSION >= QT_VERSION_CHECK(5, 5, 0)
         sslKey = QSslKey(key, QSsl::Ec);
 #else
     {
diff --git a/src/webui/abstractwebapplication.cpp b/src/webui/abstractwebapplication.cpp
index 5e7c6749a..38c369516 100644
--- a/src/webui/abstractwebapplication.cpp
+++ b/src/webui/abstractwebapplication.cpp
@@ -432,7 +432,7 @@ QStringMap AbstractWebApplication::parseCookie(const Http::Request &request) con
     // [rfc6265] 4.2.1. Syntax
     QStringMap ret;
     const QString cookieStr = request.headers.value(QLatin1String("cookie"));
-#ifdef QBT_USES_QT5
+#if QT_VERSION >= QT_VERSION_CHECK(5, 4, 0)
     const QVector<QStringRef> cookies = cookieStr.splitRef(';', QString::SkipEmptyParts);
 #else
     const QStringList cookies = cookieStr.split(';', QString::SkipEmptyParts);
@@ -442,7 +442,7 @@ QStringMap AbstractWebApplication::parseCookie(const Http::Request &request) con
         const int idx = cookie.indexOf('=');
         if (idx < 0)
             continue;
-#ifdef QBT_USES_QT5
+#if QT_VERSION >= QT_VERSION_CHECK(5, 4, 0)
         const QString name = cookie.left(idx).trimmed().toString();
         const QString value = Utils::String::unquote(cookie.mid(idx + 1).trimmed())
                                   .toString();