diff --git a/src/vs/workbench/contrib/inlineChat/browser/inlineChatSession.ts b/src/vs/workbench/contrib/inlineChat/browser/inlineChatSession.ts
index b29420bc6c6..324c4b799f8 100644
--- a/src/vs/workbench/contrib/inlineChat/browser/inlineChatSession.ts
+++ b/src/vs/workbench/contrib/inlineChat/browser/inlineChatSession.ts
@@ -298,8 +298,8 @@ export class StashedSession {
 
 function lineRangeAsRange(lineRange: LineRange, model: ITextModel): Range {
 	return lineRange.isEmpty
-		? new Range(lineRange.startLineNumber, 1, lineRange.startLineNumber, model.getLineLength(lineRange.startLineNumber))
-		: new Range(lineRange.startLineNumber, 1, lineRange.endLineNumberExclusive - 1, model.getLineLength(lineRange.endLineNumberExclusive - 1));
+		? new Range(lineRange.startLineNumber, 1, lineRange.startLineNumber, Number.MAX_SAFE_INTEGER)
+		: new Range(lineRange.startLineNumber, 1, lineRange.endLineNumberExclusive - 1, Number.MAX_SAFE_INTEGER);
 }
 
 export class HunkData {
diff --git a/src/vs/workbench/contrib/inlineChat/test/browser/inlineChatSession.test.ts b/src/vs/workbench/contrib/inlineChat/test/browser/inlineChatSession.test.ts
index 4f677a1cbfe..665206f55b0 100644
--- a/src/vs/workbench/contrib/inlineChat/test/browser/inlineChatSession.test.ts
+++ b/src/vs/workbench/contrib/inlineChat/test/browser/inlineChatSession.test.ts
@@ -200,11 +200,11 @@ suite('InlineChatSession', function () {
 
 		assert.ok(!session.textModel0.equalsTextBuffer(session.textModelN.getTextBuffer()));
 		assert.strictEqual(hunk.getState(), HunkState.Pending);
-		assert.ok(hunk.getRangesN()[0].equalsRange({ startLineNumber: 1, startColumn: 1, endLineNumber: 1, endColumn: 7 }));
+		assert.ok(hunk.getRangesN()[0].equalsRange({ startLineNumber: 1, startColumn: 1, endLineNumber: 1, endColumn: 8 }));
 
 		await makeEditAsAi(EditOperation.insert(new Position(1, 3), 'foobar'));
 		[hunk] = session.hunkData.getInfo();
-		assert.ok(hunk.getRangesN()[0].equalsRange({ startLineNumber: 1, startColumn: 1, endLineNumber: 1, endColumn: 13 }));
+		assert.ok(hunk.getRangesN()[0].equalsRange({ startLineNumber: 1, startColumn: 1, endLineNumber: 1, endColumn: 14 }));
 
 		inlineChatSessionService.releaseSession(session);