diff --git a/internal/system/textbox.go b/internal/system/textbox.go
index 399b882..8764672 100644
--- a/internal/system/textbox.go
+++ b/internal/system/textbox.go
@@ -167,6 +167,7 @@ func (this *textBox) setAttr (attr tomo.Attr, user bool) {
 		
 	case tomo.AttrOverflow:
 		if this.attrOverflow.Set(attr, user) {
+			this.invalidateMinimum()
 			this.invalidateLayout()
 		}