diff --git a/crates/backend/src/ast.rs b/crates/backend/src/ast.rs
index 8d1ac66c..9da6ed61 100644
--- a/crates/backend/src/ast.rs
+++ b/crates/backend/src/ast.rs
@@ -2,6 +2,7 @@ use proc_macro2::{Ident, Span, TokenStream, TokenTree};
 use quote::ToTokens;
 use shared;
 use syn;
+use syn::AttrStyle;
 
 #[cfg_attr(feature = "extra-traits", derive(Debug, PartialEq, Eq))]
 #[derive(Default)]
diff --git a/crates/cli-support/src/js/js2rust.rs b/crates/cli-support/src/js/js2rust.rs
index c0d45787..00c24fdf 100644
--- a/crates/cli-support/src/js/js2rust.rs
+++ b/crates/cli-support/src/js/js2rust.rs
@@ -68,6 +68,9 @@ impl<'a, 'b> Js2Rust<'a, 'b> {
     /// passed should be `this.ptr`.
     pub fn method(&mut self, method: bool) -> &mut Self {
         if method {
+            self.prelude("if (this.ptr === 0) {
+                throw new Error('Attempt to use a moved value');
+            }");
             self.rust_arguments.insert(0, "this.ptr".to_string());
         }
         self
@@ -149,6 +152,9 @@ impl<'a, 'b> Js2Rust<'a, 'b> {
             } else {
                 self.prelude(&format!("\
                     const ptr{i} = {arg}.ptr;\n\
+                    if (ptr{i} === 0) {{
+                        throw new Error('Attempt to use a moved value');
+                    }}
                     {arg}.ptr = 0;\n\
                 ", i = i, arg = name));
                 self.rust_arguments.push(format!("ptr{}", i));
@@ -361,4 +367,4 @@ impl<'a, 'b> Js2Rust<'a, 'b> {
         let ts = format!("{} {}({}): {};\n", prefix, self.js_name, ts_args, self.ret_ty);
         (js, ts)
     }
-}
+}
\ No newline at end of file