diff --git a/src/data/models/RedisCanvas.js b/src/data/models/RedisCanvas.js
index e953969f..4caf8219 100644
--- a/src/data/models/RedisCanvas.js
+++ b/src/data/models/RedisCanvas.js
@@ -1,7 +1,11 @@
 /* @flow */
 
 import { getChunkOfPixel, getOffsetOfPixel } from '../../core/utils';
-import { TILE_SIZE, THREE_CANVAS_HEIGHT } from '../../core/constants';
+import {
+  TILE_SIZE,
+  THREE_TILE_SIZE,
+  THREE_CANVAS_HEIGHT,
+} from '../../core/constants';
 import canvases from '../../canvases.json';
 import logger from '../../core/logger';
 
@@ -13,7 +17,7 @@ const UINT_SIZE = 'u8';
 const EMPTY_CACA = new Uint8Array(TILE_SIZE * TILE_SIZE);
 const EMPTY_CHUNK_BUFFER = Buffer.from(EMPTY_CACA.buffer);
 const THREE_EMPTY_CACA = new Uint8Array(
-  TILE_SIZE * TILE_SIZE * THREE_CANVAS_HEIGHT,
+  THREE_TILE_SIZE * THREE_TILE_SIZE * THREE_CANVAS_HEIGHT,
 );
 const THREE_EMPTY_CHUNK_BUFFER = Buffer.from(THREE_EMPTY_CACA.buffer);
 
diff --git a/src/routes/chunks.js b/src/routes/chunks.js
index bd1b31cd..aec3d784 100644
--- a/src/routes/chunks.js
+++ b/src/routes/chunks.js
@@ -8,7 +8,11 @@
 import type { Request, Response } from 'express';
 import etag from 'etag';
 import RedisCanvas from '../data/models/RedisCanvas';
-import { TILE_SIZE } from '../core/constants';
+import {
+  TILE_SIZE,
+  THREE_TILE_SIZE,
+  THREE_CANVAS_HEIGHT,
+} from '../core/constants';
 import logger from '../core/logger';
 
 /*
@@ -49,8 +53,10 @@ export default async (req: Request, res: Response, next) => {
     }
 
     // for temporary logging to see if we have invalid chunks in redis
-    if (chunk.length !== TILE_SIZE * TILE_SIZE) {
-      logger.error(`Chunk ${x},${y},${z} has invalid length ${chunk.length}!`);
+
+    if (chunk.length !== TILE_SIZE * TILE_SIZE
+      && chunk.length !== (THREE_TILE_SIZE ** 2) * THREE_CANVAS_HEIGHT) {
+      logger.error(`Chunk ${x},${y}/${c} has invalid length ${chunk.length}!`);
     }
 
     const curEtag = etag(chunk, { weak: true });