diff --git a/src/tiles.js b/src/tiles.js
index bf7aa97..68759fb 100644
--- a/src/tiles.js
+++ b/src/tiles.js
@@ -403,9 +403,9 @@ export const createTiles = (regl, opts) => {
             tileIndex[0],
             tileIndex[1]
           )
-          if (!this.tiles[key]?.hasLoadedChunks(chunks)) {
+          if (this.tiles[key] && !this.tiles[key].hasLoadedChunks(chunks)) {
             const loadingID = this.setLoading('chunk')
-            await this.tiles[key]?.loadChunks(chunks)
+            await this.tiles[key].loadChunks(chunks)
             this.clearLoading(loadingID)
           }
         })