diff --git a/package.json b/package.json
index b0a64b0357..7c1db9cc66 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "misskey",
-	"version": "13.1.5",
+	"version": "13.1.6",
 	"codename": "nasubi",
 	"repository": {
 		"type": "git",
diff --git a/packages/backend/src/core/entities/EmojiEntityService.ts b/packages/backend/src/core/entities/EmojiEntityService.ts
index cee85a5688..611552d89e 100644
--- a/packages/backend/src/core/entities/EmojiEntityService.ts
+++ b/packages/backend/src/core/entities/EmojiEntityService.ts
@@ -32,8 +32,8 @@ export class EmojiEntityService {
 			name: emoji.name,
 			category: emoji.category,
 			host: opts.omitHost ? undefined : emoji.host,
-			// ?? emoji.originalUrl してるのは後方互換性のため
-			url: opts.withUrl ? (emoji.publicUrl ?? emoji.originalUrl) : undefined,
+			// || emoji.originalUrl してるのは後方互換性のため（publicUrlはstringなので??はだめ）
+			url: opts.withUrl ? (emoji.publicUrl || emoji.originalUrl) : undefined,
 		};
 	}