diff --git a/crates/typst/src/math/mod.rs b/crates/typst/src/math/mod.rs
index 4b5ce56b..dc79f48b 100644
--- a/crates/typst/src/math/mod.rs
+++ b/crates/typst/src/math/mod.rs
@@ -187,8 +187,6 @@ pub fn module() -> Module {
     math.define_elem::<PrimesElem>();
     math.define_func::<abs>();
     math.define_func::<norm>();
-    math.define_func::<floor>();
-    math.define_func::<ceil>();
     math.define_func::<round>();
     math.define_func::<sqrt>();
     math.define_func::<upright>();
diff --git a/crates/typst/src/symbols/sym.rs b/crates/typst/src/symbols/sym.rs
index d09cb4c2..1dec0039 100644
--- a/crates/typst/src/symbols/sym.rs
+++ b/crates/typst/src/symbols/sym.rs
@@ -64,6 +64,14 @@ pub(crate) const SYM: &[(&str, Symbol)] = symbols! {
         spheric.rev: '⦠',
         spheric.top: '⦡',
     ],
+    ceil: [
+        #[call(crate::math::ceil)] l: '⌈',
+        r: '⌉',
+    ],
+    floor: [
+        #[call(crate::math::floor)] l: '⌊',
+        r: '⌋',
+    ],
 
     // Punctuation.
     amp: ['&', inv: '⅋'],
diff --git a/docs/src/lib.rs b/docs/src/lib.rs
index 231fe97c..7575817a 100644
--- a/docs/src/lib.rs
+++ b/docs/src/lib.rs
@@ -542,7 +542,7 @@ fn group_page(
     let mut outline_items = vec![];
     for name in &group.filter {
         let value = group.module().scope().get(name).unwrap();
-        let Value::Func(func) = value else { panic!("not a function") };
+        let Ok(ref func) = value.clone().cast::<Func>() else { panic!("not a function") };
         let func = func_model(resolver, func, &path, true);
         let id_base = urlify(&eco_format!("functions-{}", func.name));
         let children = func_outline(&func, &id_base);