diff --git a/src/view/kateviewhelpers.cpp b/src/view/kateviewhelpers.cpp
--- a/src/view/kateviewhelpers.cpp
+++ b/src/view/kateviewhelpers.cpp
@@ -61,6 +61,7 @@
 #include <QPalette>
 #include <QPen>
 #include <QAction>
+#include <QActionGroup>
 #include <QBoxLayout>
 #include <QMenu>
 #include <QStyle>
@@ -2241,14 +2242,19 @@
             continue;
         }
 
+        auto selectDefaultMarkActionGroup = new QActionGroup(&selectDefaultMark);
+        selectDefaultMarkActionGroup->setExclusive(true);
+
         QAction *mA;
         QAction *dMA;
         if (!m_doc->markDescription(markType).isEmpty()) {
             mA = markMenu.addAction(m_doc->markDescription(markType));
             dMA = selectDefaultMark.addAction(m_doc->markDescription(markType));
+            selectDefaultMarkActionGroup->addAction(dMA);
         } else {
             mA = markMenu.addAction(i18n("Mark Type %1",  bit + 1));
             dMA = selectDefaultMark.addAction(i18n("Mark Type %1",  bit + 1));
+            selectDefaultMarkActionGroup->addAction(dMA);
         }
         mA->setData(i);
         mA->setCheckable(true);