diff --git a/themes/tiddlywiki/vanilla/base.tid b/themes/tiddlywiki/vanilla/base.tid
index 7acfecf84..83dd63a59 100644
--- a/themes/tiddlywiki/vanilla/base.tid
+++ b/themes/tiddlywiki/vanilla/base.tid
@@ -620,7 +620,7 @@ button.tc-untagged-label {
 	    z-index: 1000;
 	    background-color: <<colour page-background>>;
 	    width: 100%;
-	    max-height: 100%;
+	    max-height: 50%;
 		<<if-no-sidebar "
 		    width: auto;
 		    max-height: auto;