diff --git a/src/test/ui/issues/issue-23477.rs b/src/test/ui/issues/issue-23477.rs
index 1ce05ba390d76..988ebe03ccf66 100644
--- a/src/test/ui/issues/issue-23477.rs
+++ b/src/test/ui/issues/issue-23477.rs
@@ -1,4 +1,5 @@
 // build-pass
+// ignore-asmjs wasm2js does not support source maps yet
 // compile-flags: -g
 
 pub struct Dst {