diff --git a/bindings/wasm/lib.rs b/bindings/wasm/lib.rs
index c7007a9a2..81b93480f 100644
--- a/bindings/wasm/lib.rs
+++ b/bindings/wasm/lib.rs
@@ -19,7 +19,7 @@ impl Database {
 pub struct IO {}
 
 impl limbo_core::StorageIO for IO {
-    fn get(&self, _page_idx: usize, _c: &mut limbo_core::Completion) -> Result<()> {
+    fn get(&self, _page_idx: usize, _c: Arc<limbo_core::Completion>) -> Result<()> {
         todo!();
     }
 }