diff --git a/packages/tui/CHANGELOG.md b/packages/tui/CHANGELOG.md
index bb7634ec6..23cb8dc2f 100644
--- a/packages/tui/CHANGELOG.md
+++ b/packages/tui/CHANGELOG.md
@@ -11,6 +11,7 @@
 - Fixed fullscreen double-click selection splitting paths and tokens at `~`, `.`, `\`, and `+`. Word characters now match iTerm2's defaults ([#10980](https://github.com/earendil-works/pi/issues/10980))
 - Fixed `fuzzyMatch()` ranking a query scattered over an earlier part of the text above a contiguous match later in it. It now also scores each contiguous occurrence of the query and keeps the best alignment ([#11220](https://github.com/earendil-works/pi/issues/11220), [#11296](https://github.com/earendil-works/pi/pull/11296))
 - Fixed `ProcessTerminal.setTitle()` writing control characters from the title, which could end the title sequence and send the rest to the terminal as escape sequences
+- Fixed display math wider than the content width being wrapped row by row, which split fractions and sums apart. It now falls back to the raw LaTeX source ([#11483](https://github.com/earendil-works/pi/issues/11483))
 
 ## [1.4.0] - 2026-10-21
 
diff --git a/packages/tui/src/components/markdown.ts b/packages/tui/src/components/markdown.ts
index 9194c2251..a3b526d73 100644
--- a/packages/tui/src/components/markdown.ts
+++ b/packages/tui/src/components/markdown.ts
@@ -536,10 +536,14 @@ export class Markdown implements Component {
 
 			case "latexBlock": {
 				const latexToken = token as LatexToken;
-				const rendered =
+				let rendered =
 					!latexToken.pending && this.options.renderLatex !== false
-						? (renderLatex(latexToken.text, { display: true }) ?? latexToken.raw.trim())
-						: latexToken.raw.trim();
+						? renderLatex(latexToken.text, { display: true })
+						: undefined;
+				// A 2D layout cannot be wrapped row by row; fall back to the raw source when it does not fit.
+				if (rendered === undefined || rendered.split("\n").some((line) => visibleWidth(line) > width)) {
+					rendered = latexToken.raw.trim();
+				}
 				for (const line of rendered.split("\n")) {
 					lines.push(this.applyDefaultStyle(line));
 				}
diff --git a/packages/tui/test/markdown.test.ts b/packages/tui/test/markdown.test.ts
index 38e6ceb5a..b20d84dfe 100644
--- a/packages/tui/test/markdown.test.ts
+++ b/packages/tui/test/markdown.test.ts
@@ -966,6 +966,29 @@ Inline \(A_{sf}\)`,
 			);
 		});
 
+		// Regression test for https://github.com/earendil-works/pi/issues/11483
+		it("falls back to raw source when display math is wider than the content width", () => {
+			const source = [
+				"\\[",
+				String.raw`\frac{\partial^2 u}{\partial x^2} + \frac{\partial^2 u}{\partial y^2} = \sum_{i=1}^{n} \frac{1}{i^2} + \int_0^1 f(x)\,dx`,
+				"\\]",
+			].join("\n");
+			const render = (width: number) =>
+				new Markdown(source, 0, 0, defaultMarkdownTheme).render(width).map((line) => stripAnsi(line).trimEnd());
+
+			assert.deepStrictEqual(render(40), [
+				"∂² u   ∂² u   n   1   1",
+				"──── + ──── = ∑   ── +∫ f(x) dx",
+				"∂ x²   ∂ y²  i=1  i²  0",
+			]);
+
+			const narrow = render(30);
+			assert.strictEqual(narrow[0], "\\[");
+			assert.strictEqual(narrow[narrow.length - 1], "\\]");
+			assert.ok(!narrow.some((line) => line.includes("─")));
+			assert.ok(narrow.every((line) => line.length <= 30));
+		});
+
 		// Regression tests for https://github.com/earendil-works/pi/issues/11159
 		describe("unclosed display math before tables (#11159)", () => {
 			const table = ["| A | B |", "|---|---|", "| 1 | 2 |"];