diff --git a/wasm/src/writer/luajit.rs b/wasm/src/writer/luajit.rs
index 2817766..a6746c4 100644
--- a/wasm/src/writer/luajit.rs
+++ b/wasm/src/writer/luajit.rs
@@ -683,11 +683,14 @@ impl<'a> LuaJIT<'a> {
 
 	/// # Errors
 	/// Returns `Err` if writing to `Writer` failed.
+	///
+	/// # Panics
+	/// If the number of functions overflows 32 bits.
 	pub fn gen_func_list(&self, func_list: &[Function], w: Writer) -> Result<()> {
 		let o = self.arity.len_ex();
 
 		func_list.iter().enumerate().try_for_each(|(i, v)| {
-			write_func_name(self.wasm, i as u32, o as u32, w)?;
+			write_func_name(self.wasm, i.try_into().unwrap(), o.try_into().unwrap(), w)?;
 
 			v.visit(&mut Visitor::default(), w)
 		})
diff --git a/wasm/src/writer/luau.rs b/wasm/src/writer/luau.rs
index 6d113f2..2b9fbab 100644
--- a/wasm/src/writer/luau.rs
+++ b/wasm/src/writer/luau.rs
@@ -694,7 +694,7 @@ impl<'a> Luau<'a> {
 		let o = self.arity.len_ex();
 
 		func_list.iter().enumerate().try_for_each(|(i, v)| {
-			write_func_name(self.wasm, i as u32, o as u32, w)?;
+			write_func_name(self.wasm, i.try_into().unwrap(), o.try_into().unwrap(), w)?;
 
 			v.visit(&mut Visitor::default(), w)
 		})
diff --git a/wasm/src/writer/shared.rs b/wasm/src/writer/shared.rs
index c2466de..363d441 100644
--- a/wasm/src/writer/shared.rs
+++ b/wasm/src/writer/shared.rs
@@ -1,6 +1,6 @@
 use std::{io::Result, ops::Range};
 
-use parity_wasm::elements::{Internal, Module, ResizableLimits};
+use parity_wasm::elements::{Internal, Module, NameSection, ResizableLimits};
 
 use crate::ast::node::Function;
 
@@ -36,7 +36,7 @@ pub fn write_memory_init(limit: &ResizableLimits, w: Writer) -> Result<()> {
 pub fn write_func_name(wasm: &Module, index: u32, offset: u32, w: Writer) -> Result<()> {
 	let opt = wasm
 		.names_section()
-		.and_then(|v| v.functions())
+		.and_then(NameSection::functions)
 		.and_then(|v| v.names().get(index));
 
 	write!(w, "FUNC_LIST")?;