diff --git a/src/ui/right_panel.rs b/src/ui/right_panel.rs
index 3513abf9..6d03be7d 100644
--- a/src/ui/right_panel.rs
+++ b/src/ui/right_panel.rs
@@ -20,7 +20,9 @@ use crate::ui::scrollbar::with_vertical_scrollbar;
 pub(crate) const MIN_WIDTH: f32 = 216.;
 pub(crate) const MAX_WIDTH_RATIO: f32 = 0.5;
 
-const RESIZE_HANDLE_WIDTH: f32 = 8.;
+/// How wide a panel edge is to grab. Both edges a window can drag — the tab
+/// sidebar's and this panel's — are the same target, so they are one number.
+pub(crate) const RESIZE_HANDLE_WIDTH: f32 = 8.;
 
 #[derive(Default)]
 pub(crate) struct RightPanelState {
diff --git a/src/ui/tab_sidebar.rs b/src/ui/tab_sidebar.rs
index 79993afb..41bce223 100644
--- a/src/ui/tab_sidebar.rs
+++ b/src/ui/tab_sidebar.rs
@@ -18,6 +18,7 @@ use crate::ui::app::{TITLE_BAR_HEIGHT, Tty7App};
 use crate::ui::hints::tab_badge_label;
 use crate::ui::i18n::{L10nKey, t};
 use crate::ui::reorder::{self, Reorder, Surface};
+use crate::ui::right_panel::RESIZE_HANDLE_WIDTH;
 use crate::ui::tab_strip::{DragTab, REORDER_SLIDE_MS};
 
 const MIN_SIDEBAR_WIDTH: f32 = 180.;
@@ -25,8 +26,6 @@ const MIN_SIDEBAR_WIDTH: f32 = 180.;
 const GRAB_HANDLE_W: f32 = 48.;
 const MAX_SIDEBAR_WIDTH_RATIO: f32 = 0.5;
 
-const RESIZE_HANDLE_WIDTH: f32 = 8.;
-
 const ROW_GAP: f32 = 2.;
 
 #[derive(Clone)]