diff --git a/src/ol/source/tilesource.exports b/src/ol/source/tilesource.exports
new file mode 100644
index 0000000000..c8077e23d9
--- /dev/null
+++ b/src/ol/source/tilesource.exports
@@ -0,0 +1,2 @@
+@exportSymbol ol.source.TileSource
+@exportProperty ol.source.TileSource.prototype.getTileGrid