diff --git a/packages/backend/src/server/nodeinfo.ts b/packages/backend/src/server/nodeinfo.ts
index 65fe5a3f4..018e8d330 100644
--- a/packages/backend/src/server/nodeinfo.ts
+++ b/packages/backend/src/server/nodeinfo.ts
@@ -97,10 +97,22 @@ const cache = new Cache<Awaited<ReturnType<typeof nodeinfo2>>>(
 	60 * 10,
 );
 
+// tell sharkey instances that we're mastodon so it properly federates likes
+const patch = (ctx, base) => {
+	// note: sharkey uses misskey as it's user-agent
+	if ((ctx.get("user-agent") ?? "").toLowerCase().indexOf("misskey") != -1) {
+		const copied = {...base};
+		copied.software = {...copied.software};
+		copied.software.name = 'mastodon';
+		return copied;
+	}
+	return base;
+};
+
 router.get(nodeinfo2_1path, async (ctx) => {
 	const base = await cache.fetch(null, () => nodeinfo2());
 
-	ctx.body = { version: "2.1", ...base };
+	ctx.body = { version: "2.1", ...patch(ctx, base) };
 	ctx.set("Cache-Control", "public, max-age=600");
 });
 
@@ -110,7 +122,7 @@ router.get(nodeinfo2_0path, async (ctx) => {
 	// @ts-ignore
 	base.software.repository = undefined;
 
-	ctx.body = { version: "2.0", ...base };
+	ctx.body = { version: "2.0", ...patch(ctx, base) };
 	ctx.set("Cache-Control", "public, max-age=600");
 });