diff --git a/themes/tiddlywiki/vanilla/base.tid b/themes/tiddlywiki/vanilla/base.tid
index 32c7c3875..2d5fc82a3 100644
--- a/themes/tiddlywiki/vanilla/base.tid
+++ b/themes/tiddlywiki/vanilla/base.tid
@@ -82,6 +82,7 @@ input[type="search"] {
 html button {
 	line-height: 1.2;
 	color: <<colour button-foreground>>;
+	fill: <<colour button-foreground>>;
 	background: <<colour button-background>>;
 	border-color: <<colour button-border>>;
 }