diff --git a/src/channel.h b/src/channel.h
index d531559ccd..454f6f6ec4 100755
--- a/src/channel.h
+++ b/src/channel.h
@@ -28,7 +28,9 @@
 #include <QDateTime>
 #include <QFile>
 #include <QTextStream>
-#include <QVersionNumber>
+#if QT_VERSION >= QT_VERSION_CHECK(5, 6, 0)
+# include <QVersionNumber>
+#endif
 #include "global.h"
 #include "buffer.h"
 #include "util.h"
diff --git a/src/serverdlg.h b/src/serverdlg.h
index 9bdcd1997d..399b4b98e9 100755
--- a/src/serverdlg.h
+++ b/src/serverdlg.h
@@ -36,7 +36,9 @@
 #include <QSystemTrayIcon>
 #include <QSettings>
 #include <QFileDialog>
-#include <QVersionNumber>
+#if QT_VERSION >= QT_VERSION_CHECK(5, 6, 0)
+# include <QVersionNumber>
+#endif
 #include "global.h"
 #include "server.h"
 #include "settings.h"