diff --git a/web/src/lib/components/repo/DiffView.svelte b/web/src/lib/components/repo/DiffView.svelte
index 8bcc42307..28cd25166 100644
--- a/web/src/lib/components/repo/DiffView.svelte
+++ b/web/src/lib/components/repo/DiffView.svelte
@@ -90,10 +90,10 @@
 	let shell = $state<HTMLDivElement>();
 	let dock = $state(0);
 	let diffScroll = $state(0);
-	const GAP = 16;
-	const stickyTop = $derived(stickyOffset ? stickyOffset + GAP : 0);
-	const maxHeight = $derived(stickyTop ? `calc(100svh - ${stickyTop + GAP}px)` : "100svh");
-	const dockOffset = $derived(stickyTop || GAP);
+	const HEADER_GAP = 8;
+	const stickyTop = $derived(stickyOffset ? stickyOffset + HEADER_GAP : 0);
+	const maxHeight = $derived(`calc(100svh - ${stickyTop}px)`);
+	const dockOffset = $derived(stickyTop);
 	const measureDock = () => {
 		if (!shell) return;
 		dock = window.scrollY + shell.getBoundingClientRect().top - dockOffset;