diff --git a/compiler/rustc_middle/src/mir/coverage.rs b/compiler/rustc_middle/src/mir/coverage.rs
index 11a4e7f89a7c..b7410ca5f189 100644
--- a/compiler/rustc_middle/src/mir/coverage.rs
+++ b/compiler/rustc_middle/src/mir/coverage.rs
@@ -28,7 +28,6 @@ rustc_index::newtype_index! {
     #[derive(HashStable)]
     #[encodable]
     #[orderable]
-    #[max = 0xFFFF_FFFF]
     #[debug_format = "CounterId({})"]
     pub struct CounterId {}
 }
@@ -46,7 +45,6 @@ rustc_index::newtype_index! {
     #[derive(HashStable)]
     #[encodable]
     #[orderable]
-    #[max = 0xFFFF_FFFF]
     #[debug_format = "ExpressionId({})"]
     pub struct ExpressionId {}
 }