diff --git a/widgets/mainwindow.cpp b/widgets/mainwindow.cpp
index c3653f2d3..b2a8c6f33 100644
--- a/widgets/mainwindow.cpp
+++ b/widgets/mainwindow.cpp
@@ -8243,7 +8243,7 @@ void MainWindow::setXIT(int n, Frequency base)
     }
   if (!base) base = m_freqNominal;
   m_XIT = 0;
-  if (!m_bSimplex) {
+  if (!(m_bSimplex || (SpecOp::FOX==m_specOp && m_config.superFox()))) {
     // m_bSimplex is false, so we can use split mode if requested
     if (m_config.split_mode () && (!m_config.enable_VHF_features () ||
         m_mode=="FT4" || m_mode == "FT8" || m_mode=="FST4")) {