diff --git a/packages/backend/src/server/api/endpoints/antennas/create.ts b/packages/backend/src/server/api/endpoints/antennas/create.ts
index f69501ae20..c2117d51a5 100644
--- a/packages/backend/src/server/api/endpoints/antennas/create.ts
+++ b/packages/backend/src/server/api/endpoints/antennas/create.ts
@@ -29,6 +29,11 @@ export const meta = {
 			code: "TOO_MANY_ANTENNAS",
 			id: "c3a5a51e-04d4-11ee-be56-0242ac120002",
 		},
+		noKeywords: {
+			message: "No keywords",
+			code: "NO_KEYWORDS",
+			id: "aa975b74-1ddb-11ee-be56-0242ac120002",
+		},
 	},
 
 	res: {
@@ -100,6 +105,7 @@ export const paramDef = {
 
 export default define(meta, paramDef, async (ps, user) => {
 	if (user.movedToUri != null) throw new ApiError(meta.errors.noSuchUserGroup);
+	if (ps.keywords.length === 0) throw new ApiError(meta.errors.noKeywords);
 	let userList;
 	let userGroupJoining;