diff --git a/src/convert/closures.rs b/src/convert/closures.rs
index 98512860..4bbcae2f 100644
--- a/src/convert/closures.rs
+++ b/src/convert/closures.rs
@@ -1,3 +1,5 @@
+#![allow(const_err)] // FIXME(rust-lang/rust#52603)
+
 use core::mem;
 
 use convert::{FromWasmAbi, IntoWasmAbi, GlobalStack, Stack};