diff --git a/themes/tiddlywiki/vanilla/sidebar-resizer.tid b/themes/tiddlywiki/vanilla/sidebar-resizer.tid
index 3d86f7b98..782d3f367 100644
--- a/themes/tiddlywiki/vanilla/sidebar-resizer.tid
+++ b/themes/tiddlywiki/vanilla/sidebar-resizer.tid
@@ -2,13 +2,9 @@ title: $:/themes/tiddlywiki/vanilla/sidebar-resizer
 tags: [[$:/tags/Stylesheet]]
 code-body: yes
 
-\define sidebarbreakpoint()
-<$text text={{$:/themes/tiddlywiki/vanilla/metrics/sidebarbreakpoint}}/>
-\end
+\function sidebarbreakpoint() [{$:/themes/tiddlywiki/vanilla/metrics/sidebarbreakpoint}]
 
-\define sidebarbreakpoint-minus-one()
-<$text text={{{ [{$:/themes/tiddlywiki/vanilla/metrics/sidebarbreakpoint}removesuffix[px]subtract[1]addsuffix[px]] ~[{$:/themes/tiddlywiki/vanilla/metrics/sidebarbreakpoint}] }}}/>
-\end
+\function sidebarbreakpoint-minus-one() [{$:/themes/tiddlywiki/vanilla/metrics/sidebarbreakpoint}removesuffix[px]subtract[1]addsuffix[px]] ~[{$:/themes/tiddlywiki/vanilla/metrics/sidebarbreakpoint}]
 
 \rules only filteredtranscludeinline transcludeinline macrodef macrocallinline macrocallblock conditional