diff --git a/platform/usageView/src/com/intellij/usages/impl/UsageViewTreeCellRenderer.java b/platform/usageView/src/com/intellij/usages/impl/UsageViewTreeCellRenderer.java
index a4f6e9dd5779..d6edbbb655bc 100644
--- a/platform/usageView/src/com/intellij/usages/impl/UsageViewTreeCellRenderer.java
+++ b/platform/usageView/src/com/intellij/usages/impl/UsageViewTreeCellRenderer.java
@@ -238,14 +238,14 @@ class UsageViewTreeCellRenderer extends ColoredTreeCellRenderer {
   public RowLocation isRowVisible(int row, @NotNull Rectangle visibleRect) {
     Dimension pref;
     if (cachedPreferredSize == null) {
-      pref = cachedPreferredSize = getPreferredSize();
+      cachedPreferredSize = pref = getPreferredSize();
     }
     else {
       pref = cachedPreferredSize;
     }
     pref.width = Math.max(visibleRect.width, pref.width);
     myRowBoundsCalled = true;
-    final JTree tree = getTree();
+    JTree tree = getTree();
     final Rectangle bounds = tree == null ? null : tree.getRowBounds(row);
     myRowBoundsCalled = false;
     int y = bounds == null ? 0 : bounds.y;