1 files changed, 1 insertions, 1 deletions
diff --git a/src/widgets/itemviews/qtreeview_p.h b/src/widgets/itemviews/qtreeview_p.h
index b52399f95b..eecedf727a 100644
--- a/src/widgets/itemviews/qtreeview_p.h
+++ b/src/widgets/itemviews/qtreeview_p.h
@@ -244,7 +244,7 @@ public:
     QBasicTimer openTimer;
 
     // used for drawing hilighted expand/collapse indicators
-    int hoverBranch;
+    mutable int hoverBranch;
 
     // used for blocking recursion when calling setViewportMargins from updateGeometries
     bool geometryRecursionBlock;