diff --git a/types/react-sortable-tree/index.d.ts b/types/react-sortable-tree/index.d.ts
index 0415db0414..257e3aedf9 100644
--- a/types/react-sortable-tree/index.d.ts
+++ b/types/react-sortable-tree/index.d.ts
@@ -3,6 +3,7 @@
 // Definitions by: Wouter Hardeman <https://github.com/wouterhardeman>
 //                 Jovica Zoric <https://github.com/jzoric>
 //                 Kevin Perrine <https://github.com/kevinsperrine>
+//                 Alex Maclean <https://github.com/acemac>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
 
@@ -70,6 +71,12 @@ export interface OnDragPreviousAndNextLocation extends PreviousAndNextLocation {
     nextParent: TreeItem | null;
 }
 
+export interface ShouldCopyData {
+    node: TreeNode;
+    prevPath: NumberArrayOrStringArray;
+    prevTreeIndex: number;
+}
+
 export interface OnMovePreviousAndNextLocation extends PreviousAndNextLocation {
     nextParentNode: TreeItem | null;
 }
@@ -186,6 +193,7 @@ export interface ReactSortableTreeProps {
     dndType?: string;
     placeholderRenderer?: PlaceholderRenderer;
     theme?: ThemeProps;
+    shouldCopyOnOutsideDrop?: boolean | ((data: ShouldCopyData) => boolean);
 }
 
 declare const SortableTree: React.ComponentClass<ReactSortableTreeProps>;
diff --git a/types/react-sortable-tree/react-sortable-tree-tests.tsx b/types/react-sortable-tree/react-sortable-tree-tests.tsx
index 6ed4b3e74b..695614caca 100644
--- a/types/react-sortable-tree/react-sortable-tree-tests.tsx
+++ b/types/react-sortable-tree/react-sortable-tree-tests.tsx
@@ -69,11 +69,13 @@ class Test extends React.Component {
                     dndType="testNodeType"
                     placeholderRenderer={PlaceholderRenderer}
                     theme={theme}
+					shouldCopyOnOutsideDrop={true}
                 />
                 <SortableTreeWithoutDndContext
                     treeData={[{title: "Title", subtitle: "Subtitle", children: []}]}
                     onChange={(treeData: TreeItem[]) => {}}
                     style={{width: "100px"}}
+					shouldCopyOnOutsideDrop={() => false}
                 />
             </div>
         );