diff --git a/themes/tiddlywiki/vanilla/base.tid b/themes/tiddlywiki/vanilla/base.tid
index 97bd2f1e7..45f67dcb4 100644
--- a/themes/tiddlywiki/vanilla/base.tid
+++ b/themes/tiddlywiki/vanilla/base.tid
@@ -6,10 +6,10 @@ tags: [[$:/tags/Stylesheet]]
 <$list filter="[<background>is[image]]">
 `background: url(`
 <$list filter="[<background>!has[_canonical_uri]]">
-<$macrocall $name="datauri" title={{$:/themes/tiddlywiki/vanilla/settings/backgroundimage}}/>
+`"`<$macrocall $name="datauri" title={{$:/themes/tiddlywiki/vanilla/settings/backgroundimage}}/>`"`
 </$list>
 <$list filter="[<background>has[_canonical_uri]]">
-<$view tiddler={{$:/themes/tiddlywiki/vanilla/settings/backgroundimage}} field="_canonical_uri"/>
+`"`<$view tiddler={{$:/themes/tiddlywiki/vanilla/settings/backgroundimage}} field="_canonical_uri"/>`"`
 </$list>
 `) center center;`
 `background-attachment: `{{$:/themes/tiddlywiki/vanilla/settings/backgroundimageattachment}}`;