diff --git a/apps/web/src/components/pullRequest/PullRequestCodeTab.tsx b/apps/web/src/components/pullRequest/PullRequestCodeTab.tsx
index caadd569b9c5f7baf28572fb37704e99d64e12b4..d531259e5781a1b616c10d6461635ebde93e4d3a 100644
--- a/apps/web/src/components/pullRequest/PullRequestCodeTab.tsx
+++ b/apps/web/src/components/pullRequest/PullRequestCodeTab.tsx
@@ -37,6 +37,7 @@ import { orderDiffFiles } from "./pullRequestFileOrder.logic";
 import {
   buildFileDiffRenderKey,
   fnv1a32,
+  getDiffLineStat,
   getRenderablePatch,
   resolveDiffThemeName,
   resolveFileDiffPath,
@@ -596,6 +597,23 @@ function PullRequestCodeTab({
       ),
     [loadedSlices],
   );
+  const sourceFileStats = useMemo(
+    () =>
+      new Map(
+        parsedSlices.flatMap((parsed) =>
+          parsed?.kind === "files"
+            ? parsed.files.map(
+                (file, index) =>
+                  [
+                    buildFileDiffRenderKey(file),
+                    getDiffLineStat([parsed.sourceFiles[index] ?? file]),
+                  ] as const,
+              )
+            : [],
+        ),
+      ),
+    [parsedSlices],
+  );
   const fileKeys = useMemo(() => items.map((item) => item.id), [items]);
   const collapsedFileKeys = useMemo(
     () => new Set(items.filter((item) => item.collapsed === true).map((item) => item.id)),
@@ -811,12 +829,8 @@ function PullRequestCodeTab({
   const renderHeaderMetadata = useCallback(
     (item: CodeViewItem<ReviewAnnotationGroup>) => {
       if (item.type !== "diff") return null;
-      let additions = 0;
-      let deletions = 0;
-      for (const hunk of item.fileDiff.hunks) {
-        additions += hunk.additionLines;
-        deletions += hunk.deletionLines;
-      }
+      let { additions, deletions } =
+        sourceFileStats.get(item.id) ?? getDiffLineStat([item.fileDiff]);
       const path = resolveFileDiffPath(item.fileDiff);
       if (additions === 0 && deletions === 0) {
         const withheld = omittedFileStats.get(path);
@@ -864,7 +878,7 @@ function PullRequestCodeTab({
         </span>
       );
     },
-    [omittedFileStats],
+    [omittedFileStats, sourceFileStats],
   );
 
   const diffViewOptions = useMemo(