diff --git a/shared-operations/src/functions/common/getImagesOnPage.ts b/shared-operations/src/functions/common/getImagesOnPage.ts
index 01131261..6c53c353 100644
--- a/shared-operations/src/functions/common/getImagesOnPage.ts
+++ b/shared-operations/src/functions/common/getImagesOnPage.ts
@@ -7,7 +7,7 @@ export type PDFJSImage = {
     width: number;
     height: number;
     interpolate?: any;
-    kind: number;
+    kind: number; // TODO: Document what this is, maybe hasAlpha?
     data: Uint8ClampedArray;
 };