diff --git a/src/objectliterals.jsdoc b/src/objectliterals.jsdoc
index f78ae1f386..03b42ccef8 100644
--- a/src/objectliterals.jsdoc
+++ b/src/objectliterals.jsdoc
@@ -338,7 +338,7 @@
  *     requeests.
  * @property {ol.Extent|undefined} extent Extent.
  * @property {ol.tilegrid.WMTS} tileGrid Tile grid.
- * @property {ol.Projection|undefined} projection Projection.
+ * @property {ol.ProjectionLike} projection Projection.
  * @property {ol.source.WMTSRequestEncoding|undefined} requestEncoding Request
  *     encoding.
  * @property {string} layer Layer.