diff --git a/src/dock_gui.cpp b/src/dock_gui.cpp
index b157f65d76..b55d6a1317 100644
--- a/src/dock_gui.cpp
+++ b/src/dock_gui.cpp
@@ -275,7 +275,7 @@ static const NWidgetPart _nested_build_docks_toolbar_widgets[] = {
 	NWidget(NWID_HORIZONTAL_LTR),
 		NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, DTW_CANAL), SetMinimalSize(22, 22), SetFill(false, true), SetDataTip(SPR_IMG_BUILD_CANAL, STR_WATERWAYS_TOOLBAR_BUILD_CANALS_TOOLTIP),
 		NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, DTW_LOCK), SetMinimalSize(22, 22), SetFill(false, true), SetDataTip(SPR_IMG_BUILD_LOCK, STR_WATERWAYS_TOOLBAR_BUILD_LOCKS_TOOLTIP),
-		NWidget(WWT_PANEL, COLOUR_DARK_GREEN, DTW_SEPERATOR), SetMinimalSize(5, 22), SetFill(false, true), EndContainer(),
+		NWidget(WWT_PANEL, COLOUR_DARK_GREEN, DTW_SEPERATOR), SetMinimalSize(5, 22), SetFill(true, true), EndContainer(),
 		NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, DTW_DEMOLISH), SetMinimalSize(22, 22), SetFill(false, true), SetDataTip(SPR_IMG_DYNAMITE, STR_TOOLTIP_DEMOLISH_BUILDINGS_ETC),
 		NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, DTW_DEPOT), SetMinimalSize(22, 22), SetFill(false, true), SetDataTip(SPR_IMG_SHIP_DEPOT, STR_WATERWAYS_TOOLBAR_BUILD_DEPOT_TOOLTIP),
 		NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, DTW_STATION), SetMinimalSize(22, 22), SetFill(false, true), SetDataTip(SPR_IMG_SHIP_DOCK, STR_WATERWAYS_TOOLBAR_BUILD_DOCK_TOOLTIP),