diff --git a/src/Gui/Tree.cpp b/src/Gui/Tree.cpp
index 21b6a8784e..d30a1c39df 100644
--- a/src/Gui/Tree.cpp
+++ b/src/Gui/Tree.cpp
@@ -88,7 +88,6 @@ static TreeWidget* _LastSelectedTreeWidget;
 const int TreeWidget::DocumentType = 1000;
 const int TreeWidget::ObjectType = 1001;
 static bool _DragEventFilter;
-static bool _DraggingActive;
 
 void TreeParams::onItemBackgroundChanged()
 {
@@ -479,7 +478,7 @@ TreeWidget::TreeWidget(const char* name, QWidget* parent)
 
     setupResizableColumn(this);
     this->header()->setStretchLastSection(false);
-    QObject::connect(this->header(), &QHeaderView::sectionResized, [this](int idx, int, int newSize) {
+    QObject::connect(this->header(), &QHeaderView::sectionResized, [](int idx, int, int newSize) {
         if (idx)
             TreeParams::setColumnSize2(newSize);
         else
diff --git a/src/Gui/TreeParams.cpp b/src/Gui/TreeParams.cpp
index c8ece368bb..467cb76946 100644
--- a/src/Gui/TreeParams.cpp
+++ b/src/Gui/TreeParams.cpp
@@ -1404,7 +1404,7 @@ void TreeParams::onResizableColumnChanged() {
 }
 
 void TreeParams::onIconSizeChanged() {
-    auto tree = TreeWidget::instance();
+    // auto tree = TreeWidget::instance();
     // Commented out temporarily while merging PR #7888
     //if (tree)
         //tree->setIconHeight(TreeParams::getIconSize());