diff --git a/server/src/workflow-management/selector.ts b/server/src/workflow-management/selector.ts
index d948b01a..71a0e965 100644
--- a/server/src/workflow-management/selector.ts
+++ b/server/src/workflow-management/selector.ts
@@ -734,7 +734,7 @@ interface SelectorResult {
  * @returns {Promise<Selectors|null|undefined>}
  */
 
-export const getNonUniqueSelectors = async (page: Page, coordinates: Coordinates) => {
+export const getNonUniqueSelectors = async (page: Page, coordinates: Coordinates): Promise<SelectorResult> => {
   try {
     const selectors = await page.evaluate(({ x, y }: { x: number, y: number }) => {