1 files changed, 4 insertions, 0 deletions
diff --git a/compiler/rustc_lint/src/nonstandard_style.rs b/compiler/rustc_lint/src/nonstandard_style.rs
index 79253cbc8..145de4948 100644
--- a/compiler/rustc_lint/src/nonstandard_style.rs
+++ b/compiler/rustc_lint/src/nonstandard_style.rs
@@ -533,6 +533,10 @@ impl<'tcx> LateLintPass<'tcx> for NonUpperCaseGlobals {
 
     fn check_generic_param(&mut self, cx: &LateContext<'_>, param: &hir::GenericParam<'_>) {
         if let GenericParamKind::Const { .. } = param.kind {
+            // `rustc_host` params are explicitly allowed to be lowercase.
+            if cx.tcx.has_attr(param.def_id, sym::rustc_host) {
+                return;
+            }
             NonUpperCaseGlobals::check_upper_case(cx, "const parameter", &param.name.ident());
         }
     }