2 files changed, 5 insertions, 4 deletions
diff --git a/library/src/math/mod.rs b/library/src/math/mod.rs
index 7136c8b9..9d25d485 100644
--- a/library/src/math/mod.rs
+++ b/library/src/math/mod.rs
@@ -30,7 +30,7 @@ impl MathNode {
 }
 
 impl Show for MathNode {
-    fn show(&self, _: Tracked<dyn World>, styles: StyleChain) -> Content {
+    fn show(&self, _: &mut Vt, _: &Content, styles: StyleChain) -> Content {
         let mut map = StyleMap::new();
         map.set_family(FontFamily::new("NewComputerModernMath"), styles);
 
@@ -51,11 +51,11 @@ impl Show for MathNode {
 impl Layout for MathNode {
     fn layout(
         &self,
-        world: Tracked<dyn World>,
+        vt: &mut Vt,
         styles: StyleChain,
         _: &Regions,
     ) -> SourceResult<Fragment> {
-        layout_tex(world, &self.texify(), self.display, styles)
+        layout_tex(vt, &self.texify(), self.display, styles)
     }
 }
 
diff --git a/library/src/math/tex.rs b/library/src/math/tex.rs
index 5f332f3c..b2b6486e 100644
--- a/library/src/math/tex.rs
+++ b/library/src/math/tex.rs
@@ -35,13 +35,14 @@ impl Texify for Content {
 
 /// Layout a TeX formula into a frame.
 pub fn layout_tex(
-    world: Tracked<dyn World>,
+    vt: &Vt,
     tex: &str,
     display: bool,
     styles: StyleChain,
 ) -> SourceResult<Fragment> {
     // Load the font.
     let variant = variant(styles);
+    let world = vt.world();
     let mut font = None;
     for family in families(styles) {
         font = world.book().select(family, variant).and_then(|id| world.font(id));