diff --git a/distribution/openrct2.d.ts b/distribution/openrct2.d.ts
index 3954ce5b9b..5dc8062478 100644
--- a/distribution/openrct2.d.ts
+++ b/distribution/openrct2.d.ts
@@ -3709,6 +3709,11 @@ declare global {
          */
         readonly availableCostumes: StaffCostume[];
 
+        /**
+         * Returns an array of costume strings with inline sprites.
+         */
+        getCostumeStrings(): string[];
+
         /**
          * The staff member's costume.
          */