diff --git a/types/pouchdb-core/index.d.ts b/types/pouchdb-core/index.d.ts
index 0dbf5def5b..63f03a6832 100644
--- a/types/pouchdb-core/index.d.ts
+++ b/types/pouchdb-core/index.d.ts
@@ -9,6 +9,12 @@
 /// <reference types="debug" />
 /// <reference types="pouchdb-find" />
 
+interface Blob {
+    readonly size: number;
+    readonly type: string;
+    slice(start?: number, end?: number, contentType?: string): Blob;
+}
+
 interface Buffer extends Uint8Array {
     write(string: string, offset?: number, length?: number, encoding?: string): number;
     toString(encoding?: string, start?: number, end?: number): string;