diff --git a/src/textual/css/_style_properties.py b/src/textual/css/_style_properties.py
index bc16b60fac..c66068d280 100644
--- a/src/textual/css/_style_properties.py
+++ b/src/textual/css/_style_properties.py
@@ -956,13 +956,16 @@ def __set__(self, obj: StylesBase, color: Color | str | None) -> None:
         if obj.node is None:
             return
 
-        widget = cast("Widget", obj.node)
+        from ..widget import Widget
 
-        if widget.show_horizontal_scrollbar:
-            widget.horizontal_scrollbar.refresh()
+        if isinstance(obj.node, Widget):
+            widget = obj.node
+
+            if widget.show_horizontal_scrollbar:
+                widget.horizontal_scrollbar.refresh()
 
-        if widget.show_vertical_scrollbar:
-            widget.vertical_scrollbar.refresh()
+            if widget.show_vertical_scrollbar:
+                widget.vertical_scrollbar.refresh()
 
 
 class StyleFlagsProperty: