diff --git a/packages/backend/src/server/api/endpoints/notes/update.ts b/packages/backend/src/server/api/endpoints/notes/update.ts
index 9af98ffa83..6bc0e3d7f9 100644
--- a/packages/backend/src/server/api/endpoints/notes/update.ts
+++ b/packages/backend/src/server/api/endpoints/notes/update.ts
@@ -89,6 +89,34 @@ export const paramDef = {
 			required: ['choices'],
 		},
 	},
+	// (re)note with text, files and poll are optional
+	if: {
+		properties: {
+			renoteId: {
+				type: 'null',
+			},
+			fileIds: {
+				type: 'null',
+			},
+			mediaIds: {
+				type: 'null',
+			},
+			poll: {
+				type: 'null',
+			},
+		},
+	},
+	then: {
+		properties: {
+			text: {
+				type: 'string',
+				minLength: 1,
+				maxLength: MAX_NOTE_TEXT_LENGTH,
+				pattern: '[^\\s]+',
+			},
+		},
+		required: ['text'],
+	},
 	required: ['noteId', 'text', 'cw'],
 } as const;