diff --git a/src/widgets/dropdown.cpp b/src/widgets/dropdown.cpp
--- a/src/widgets/dropdown.cpp
+++ b/src/widgets/dropdown.cpp
@@ -42,7 +42,7 @@ static WindowDesc _dropdown_desc(__FILE_
 struct DropdownWindow : Window {
 	WidgetID parent_button;       ///< Parent widget number where the window is dropped from.
 	Rect wi_rect;                 ///< Rect of the button that opened the dropdown.
-	const DropDownList list;      ///< List with dropdown menu items.
+	DropDownList list;            ///< List with dropdown menu items.
 	int selected_result;          ///< Result value of the selected item in the list.
 	byte click_delay = 0;         ///< Timer to delay selection.
 	bool drag_mode = true;
@@ -303,8 +303,23 @@ struct DropdownWindow : Window {
 			}
 		}
 	}
+
+	void ReplaceList(DropDownList &&list)
+	{
+		this->list = std::move(list);
+		this->UpdateSizeAndPosition();
+		this->ReInit(0, 0);
+		this->InitializePositionSize(this->position.x, this->position.y, this->nested_root->smallest_x, this->nested_root->smallest_y);
+		this->SetDirty();
+	}
 };
 
+void ReplaceDropDownList(Window *parent, DropDownList &&list)
+{
+	DropdownWindow *ddw = dynamic_cast<DropdownWindow *>(parent->FindChildWindow(WC_DROPDOWN_MENU));
+	if (ddw != nullptr) ddw->ReplaceList(std::move(list));
+}
+
 /**
  * Determine width and height required to fully display a DropDownList
  * @param list The list.
diff --git a/src/widgets/dropdown_type.h b/src/widgets/dropdown_type.h
--- a/src/widgets/dropdown_type.h
+++ b/src/widgets/dropdown_type.h
@@ -215,4 +215,6 @@ void ShowDropDownList(Window *w, DropDow
 
 Dimension GetDropDownListDimension(const DropDownList &list);
 
+void ReplaceDropDownList(Window *parent, DropDownList &&list);
+
 #endif /* WIDGETS_DROPDOWN_TYPE_H */