diff --git a/src/calibre/gui2/preferences/look_feel_tabs/tb_icon_rules.py b/src/calibre/gui2/preferences/look_feel_tabs/tb_icon_rules.py
index bb17bafdd7..0e35bfa260 100644
--- a/src/calibre/gui2/preferences/look_feel_tabs/tb_icon_rules.py
+++ b/src/calibre/gui2/preferences/look_feel_tabs/tb_icon_rules.py
@@ -113,6 +113,7 @@ class TbIconRulesTab(ConfigTabWidget, Ui_Form):
                     ('', _('Category'), _('Value'), _('Icon file or template'),_('For children')))
         self.rules_table.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu)
         self.rules_table.customContextMenuRequested.connect(self.show_context_menu)
+        self.rules_table.setSelectionMode(QAbstractItemView.SelectionMode.SingleSelection)
 
         for i in range(0, HEADER_SECTION_COUNT):
             item = self.rules_table.horizontalHeaderItem(i)