diff --git a/core/gui/prioritize_dialog.py b/core/gui/prioritize_dialog.py
index 7437497e..62f57619 100644
--- a/core/gui/prioritize_dialog.py
+++ b/core/gui/prioritize_dialog.py
@@ -72,9 +72,10 @@ class PrioritizeDialog(GUIObject):
         # Add selected criteria in criteria_list to prioritization_list.
         if self.criteria_list.selected_index is None:
             return
-        crit = self.criteria[self.criteria_list.selected_index]
-        self.prioritizations.append(crit)
-        del crit
+        for i in self.criteria_list.selected_indexes:
+            crit = self.criteria[i]
+            self.prioritizations.append(crit)
+            del crit
         self.prioritization_list[:] = [crit.display for crit in self.prioritizations]
 
     def remove_selected(self):
diff --git a/qt/prioritize_dialog.py b/qt/prioritize_dialog.py
index d3e76322..3fb1ef02 100644
--- a/qt/prioritize_dialog.py
+++ b/qt/prioritize_dialog.py
@@ -102,6 +102,7 @@ class PrioritizeDialog(QDialog):
         self.promptLabel.setWordWrap(True)
         self.categoryCombobox = QComboBox()
         self.criteriaListView = QListView()
+        self.criteriaListView.setSelectionMode(QAbstractItemView.ExtendedSelection)
         self.addCriteriaButton = QPushButton(
             self.style().standardIcon(QStyle.SP_ArrowRight), ""
         )