diff --git a/aegisub/src/video_display.cpp b/aegisub/src/video_display.cpp
index 63681b411..45c7c33bb 100644
--- a/aegisub/src/video_display.cpp
+++ b/aegisub/src/video_display.cpp
@@ -404,6 +404,7 @@ void VideoDisplay::SetTool(VisualToolBase *new_tool) {
 	tool->SetDisplayArea(viewport_left, viewport_top, viewport_width, viewport_height);
 
 	// Update size as the new typesetting tool may have changed the subtoolbar size
+	GetGrandParent()->Layout();
 	UpdateSize();
 }