diff --git a/src/dock_gui.cpp b/src/dock_gui.cpp
index da5b8db49a..6e6fed3a67 100644
--- a/src/dock_gui.cpp
+++ b/src/dock_gui.cpp
@@ -312,7 +312,7 @@ static const NWidgetPart _nested_build_docks_scen_toolbar_widgets[] = {
 	NWidget(NWID_HORIZONTAL),
 		NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, DTW_CANAL), SetMinimalSize(22, 22), SetFill(false, true), SetDataTip(SPR_IMG_BUILD_CANAL, STR_WATERWAYS_TOOLBAR_CREATE_LAKE_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_RIVER), SetMinimalSize(22, 22), SetFill(false, true), SetDataTip(SPR_IMG_BUILD_RIVER, STR_WATERWAYS_TOOLBAR_CREATE_RIVER_TOOLTIP),
 		NWidget(WWT_IMGBTN, COLOUR_DARK_GREEN, DTW_BUILD_AQUEDUCT), SetMinimalSize(22, 22), SetFill(false, true), SetDataTip(SPR_IMG_AQUEDUCT, STR_WATERWAYS_TOOLBAR_BUILD_AQUEDUCT_TOOLTIP),