diff --git a/core/wiki/macros/sidebar-resizer.tid b/core/wiki/macros/sidebar-resizer.tid
index 270b2ce7d..02b66c6d3 100644
--- a/core/wiki/macros/sidebar-resizer.tid
+++ b/core/wiki/macros/sidebar-resizer.tid
@@ -2,14 +2,14 @@ title: $:/core/macros/sidebar-resizer
 
 \procedure sidebar-resizer-pointerdown-actions()
 <%if [[$:/state/sidebar/resizing]is[missing]then<event-mousebutton>match[left]then<modifier>match[normal]] %>
-	<$let dragDiff=<<event-fromselected-posx>> dragWidth=<<tv-selectednode-width>> rightDiff={{{ [<dragWidth>subtract<dragDiff>] }}} storyRiverWidth={{{ [<event-fromcatcher-posx>subtract<dragDiff>subtract[14]add[42]] }}} sidebarWidth={{{ [<tv-widgetnode-width>subtract<event-fromcatcher-posx>add<dragDiff>add[14]] }}}>
+	<$let dragDiff=<<event-fromselected-posx>> storyRiverWidth={{{ [<event-fromcatcher-posx>subtract<dragDiff>subtract[14]add[42]] }}} sidebarWidth={{{ [<tv-widgetnode-width>subtract<event-fromcatcher-posx>add<dragDiff>add[14]] }}}>
 		<%if  [{$:/themes/tiddlywiki/vanilla/options/sidebarlayout}match[fixed-fluid]] %>
 			<$action-setfield $tiddler="$:/themes/tiddlywiki/vanilla/metrics/storywidth" text={{{ [<storyRiverWidth>addsuffix[px]] }}}/>
 			<$action-setfield $tiddler="$:/themes/tiddlywiki/vanilla/metrics/storyright" text={{{ [<storyRiverWidth>addsuffix[px]] }}}/>
 		<% else %>
 			<$action-setfield $tiddler="$:/themes/tiddlywiki/vanilla/metrics/sidebarwidth" text={{{ [<sidebarWidth>addsuffix[px]] }}}/>
 		<% endif %>
-		<$action-setfield $tiddler="$:/state/sidebar/resizing" text="yes" drag-diff=<<dragDiff>> right-diff=<<rightDiff>>/>
+		<$action-setfield $tiddler="$:/state/sidebar/resizing" text="yes" drag-diff=<<dragDiff>>/>
 	</$let>
 <% endif %>
 \end