diff --git a/libs/ui/widgets/kis_categorized_list_view.h b/libs/ui/widgets/kis_categorized_list_view.h
--- a/libs/ui/widgets/kis_categorized_list_view.h
+++ b/libs/ui/widgets/kis_categorized_list_view.h
@@ -33,7 +33,7 @@
     void setModel(QAbstractItemModel* model) override;
 
     QSize sizeHint() const override;
-
+    void setCompositeBoxControl(bool value);
 
 Q_SIGNALS:
     void sigCategoryToggled(const QModelIndex& index, bool toggled);
@@ -50,10 +50,9 @@
     void mousePressEvent(QMouseEvent* event) override;
     void mouseReleaseEvent(QMouseEvent* event) override;
 
-
-
 private:
-    void updateRows(int begin, int end);
+    void updateRows(int begin, int end);    
+    bool isCompositeBoxControl = false;
 };
 
 #endif // KIS_CATEGORIZED_LIST_VIEW_H_
diff --git a/libs/ui/widgets/kis_categorized_list_view.cpp b/libs/ui/widgets/kis_categorized_list_view.cpp
--- a/libs/ui/widgets/kis_categorized_list_view.cpp
+++ b/libs/ui/widgets/kis_categorized_list_view.cpp
@@ -52,6 +52,11 @@
     return QSize(width, sh.height());
 }
 
+void KisCategorizedListView::setCompositeBoxControl(bool value)
+{
+    isCompositeBoxControl = value;
+}
+
 void KisCategorizedListView::updateRows(int begin, int end)
 {
     for(; begin!=end; ++begin) {
@@ -111,8 +116,32 @@
 {
     QListView::mousePressEvent(event);
 
+    QModelIndex index = QListView::indexAt(event->pos());
+
+
+    // hack: the custom compositeop combo box has issues with events being sent
+    // those widgets will run this extra code to help them know if a checkbox is clicked
+    if (isCompositeBoxControl) {
+
+        if (index.isValid() && (event->pos().x() < 25) && (model()->flags(index) & Qt::ItemIsUserCheckable)) {
+            QListView::mousePressEvent(event);
+            QMouseEvent releaseEvent(QEvent::MouseButtonRelease,
+                            event->pos(),
+                            event->globalPos(),
+                            event->button(),
+                            event->button() | event->buttons(),
+                            event->modifiers());
+
+            QListView::mouseReleaseEvent(&releaseEvent);
+            emit sigEntryChecked(index);
+
+            return; // don't worry about running the 'right' click logic below. that is not relevant with composite ops
+        }
+    }
+
+
+
     if(event->button() == Qt::RightButton){
-        QModelIndex index = QListView::indexAt(event->pos());
         QMenu menu(this);
         if(index.data(__CategorizedListModelBase::isLockableRole).toBool() && index.isValid()) {
 
diff --git a/libs/ui/widgets/kis_cmb_composite.cc b/libs/ui/widgets/kis_cmb_composite.cc
--- a/libs/ui/widgets/kis_cmb_composite.cc
+++ b/libs/ui/widgets/kis_cmb_composite.cc
@@ -62,6 +62,7 @@
     m_allowToHidePopup(true)
 {
     m_view = new KisCategorizedListView();
+    m_view->setCompositeBoxControl(true);
 
     setMaxVisibleItems(100);
     setSizeAdjustPolicy(AdjustToContents);