diff --git a/packages/backend/src/server/api/endpoints/notes/create.ts b/packages/backend/src/server/api/endpoints/notes/create.ts
index e63dc6f20b..29a0f7418c 100644
--- a/packages/backend/src/server/api/endpoints/notes/create.ts
+++ b/packages/backend/src/server/api/endpoints/notes/create.ts
@@ -191,7 +191,7 @@ export const paramDef = {
 	then: {
 		properties: {
 			text: {
-				type: ['string', 'null'],
+				type: 'string',
 				minLength: 1,
 				maxLength: MAX_NOTE_TEXT_LENGTH,
 				pattern: '[^\\s]+',