diff --git a/crates/typst-library/src/layout/par.rs b/crates/typst-library/src/layout/par.rs
index 6d1b653f7..271d9467b 100644
--- a/crates/typst-library/src/layout/par.rs
+++ b/crates/typst-library/src/layout/par.rs
@@ -1344,7 +1344,9 @@ fn finalize(
     let width = if !region.x.is_finite()
         || (!expand && lines.iter().all(|line| line.fr().is_zero()))
     {
-        p.hang + lines.iter().map(|line| line.width).max().unwrap_or_default()
+        region
+            .x
+            .min(p.hang + lines.iter().map(|line| line.width).max().unwrap_or_default())
     } else {
         region.x
     };
diff --git a/tests/ref/visualize/shape-rect.png b/tests/ref/visualize/shape-rect.png
index 17675400f..48d40447b 100644
Binary files a/tests/ref/visualize/shape-rect.png and b/tests/ref/visualize/shape-rect.png differ
diff --git a/tests/typ/visualize/shape-rect.typ b/tests/typ/visualize/shape-rect.typ
index 951d5beaa..17dd0f92a 100644
--- a/tests/typ/visualize/shape-rect.typ
+++ b/tests/typ/visualize/shape-rect.typ
@@ -53,3 +53,11 @@
 ---
 // Error: 15-21 expected length, color, dictionary, stroke, none, or auto, found array
 #rect(stroke: (1, 2))
+
+---
+#set page(width: 17.8cm)
+#lorem(100)
+#rect(lorem(100))
+#set par(justify: true)
+#lorem(100)
+#rect(lorem(100))