diff --git a/crates/typst/src/text/font/book.rs b/crates/typst/src/text/font/book.rs
index c875ab172..2e64533e2 100644
--- a/crates/typst/src/text/font/book.rs
+++ b/crates/typst/src/text/font/book.rs
@@ -93,8 +93,8 @@ impl FontBook {
         variant: FontVariant,
         text: &str,
     ) -> Option<usize> {
-        // Find the fonts that contain the text's first char ...
-        let c = text.chars().next()?;
+        // Find the fonts that contain the text's first non-space char ...
+        let c = text.chars().find(|c| !c.is_whitespace())?;
         let ids = self
             .infos
             .iter()
diff --git a/tests/ref/bugs/2105-linebreak-tofu.png b/tests/ref/bugs/2105-linebreak-tofu.png
new file mode 100644
index 000000000..78f937eb2
Binary files /dev/null and b/tests/ref/bugs/2105-linebreak-tofu.png differ
diff --git a/tests/typ/bugs/2105-linebreak-tofu.typ b/tests/typ/bugs/2105-linebreak-tofu.typ
new file mode 100644
index 000000000..4dd5a2441
--- /dev/null
+++ b/tests/typ/bugs/2105-linebreak-tofu.typ
@@ -0,0 +1 @@
+#linebreak()中文