diff --git a/editions/prerelease/tiddlers/theme.tid b/editions/prerelease/tiddlers/theme.tid
new file mode 100644
index 000000000..36b7610c7
--- /dev/null
+++ b/editions/prerelease/tiddlers/theme.tid
@@ -0,0 +1,3 @@
+title: $:/theme
+
+$:/themes/tiddlywiki/vanilla
\ No newline at end of file