diff --git a/Engine/source/gui/controls/guiTreeViewCtrl.cpp b/Engine/source/gui/controls/guiTreeViewCtrl.cpp
index 7f36a5903..bbace92dc 100644
--- a/Engine/source/gui/controls/guiTreeViewCtrl.cpp
+++ b/Engine/source/gui/controls/guiTreeViewCtrl.cpp
@@ -1237,7 +1237,7 @@ void GuiTreeViewCtrl::buildVisibleTree(bool bForceFullUpdate)
       bForceFullUpdate = true;
 
    // Update the flags.
-   mFlags.clear(RebuildVisible);
+   mFlags.set(RebuildVisible);
 
    // build the root items
    Item *traverse = mRoot;