diff --git a/crates/postcompile/README.md b/crates/postcompile/README.md
index baad501fc..a673309be 100644
--- a/crates/postcompile/README.md
+++ b/crates/postcompile/README.md
@@ -19,6 +19,8 @@ This is particularly useful when making snapshot tests of proc-macros, look belo
 #[test]
 fn some_cool_test() {
     insta::assert_snapshot!(postcompile::compile! {
+        #![allow(unused)]
+
         #[derive(Debug, Clone)]
         struct Test {
             a: u32,