diff --git a/src/httpdocument.cpp b/src/httpdocument.cpp
index 31aefd6..67643d7 100644
--- a/src/httpdocument.cpp
+++ b/src/httpdocument.cpp
@@ -24,6 +24,7 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include <QJsonDocument>
 #include <QCryptographicHash>
 #include <QDebug>
+#include <QDateTime>
 
 const QString HttpDocument::Code::_200 = "200 OK";
 const QString HttpDocument::Code::_303 = "303 See Other";