diff --git a/packages/backend/src/server/api/index.ts b/packages/backend/src/server/api/index.ts
index 6d02ad0ab5..bc1f94a7c5 100644
--- a/packages/backend/src/server/api/index.ts
+++ b/packages/backend/src/server/api/index.ts
@@ -68,6 +68,17 @@ mastoRouter.use(
 	}),
 );
 
+mastoRouter.use(async (ctx, next) => {
+	if (ctx.request.query) {
+		if (!ctx.request.body || Object.keys(ctx.request.body).length === 0) {
+			ctx.request.body = ctx.request.query
+		} else {
+			ctx.request.body = {...ctx.request.body, ...ctx.request.query}
+		}
+	}
+	await next();
+});
+
 apiMastodonCompatible(mastoRouter);
 
 /**
diff --git a/packages/backend/src/server/index.ts b/packages/backend/src/server/index.ts
index 6ce28bf1a8..73cf58ec27 100644
--- a/packages/backend/src/server/index.ts
+++ b/packages/backend/src/server/index.ts
@@ -78,6 +78,17 @@ mastoRouter.use(
 	}),
 );
 
+mastoRouter.use(async (ctx, next) => {
+	if (ctx.request.query) {
+		if (!ctx.request.body || Object.keys(ctx.request.body).length === 0) {
+			ctx.request.body = ctx.request.query
+		} else {
+			ctx.request.body = {...ctx.request.body, ...ctx.request.query}
+		}
+	}
+	await next();
+});
+
 // Routing
 router.use(activityPub.routes());
 router.use(nodeinfo.routes());