diff --git a/src/utils/common.ts b/src/utils/common.ts
index 83e99be378b..c8b37c4e3fd 100644
--- a/src/utils/common.ts
+++ b/src/utils/common.ts
@@ -616,6 +616,7 @@ export function getShinyDescriptor(variant: Variant): string {
  * If the input isn't already an array, turns it into one.
  * @returns An array with the same type as the type of the input
  */
-export function coerceArray<T>(input: T | T[]): T[] {
+export function coerceArray<T>(input: T): T extends any[] ? T : [T];
+export function coerceArray<T>(input: T): T | [T] {
   return Array.isArray(input) ? input : [input];
 }