diff --git a/compiler/rustc_middle/src/thir.rs b/compiler/rustc_middle/src/thir.rs
index f1d19800a7891..eed27345b747b 100644
--- a/compiler/rustc_middle/src/thir.rs
+++ b/compiler/rustc_middle/src/thir.rs
@@ -839,7 +839,7 @@ pub enum PatKind<'tcx> {
     ///   exhaustiveness to cover exactly its own value, similar to `&str`, but these values are
     ///   much simpler.
     /// * raw pointers derived from integers, other raw pointers will have already resulted in an
-    //    error.
+    ///   error.
     /// * `String`, if `string_deref_patterns` is enabled.
     Constant {
         value: ty::Value<'tcx>,