diff --git a/compiler/rustc_middle/src/mir/syntax.rs b/compiler/rustc_middle/src/mir/syntax.rs
index 499fd84f1b8..dcc37c565c9 100644
--- a/compiler/rustc_middle/src/mir/syntax.rs
+++ b/compiler/rustc_middle/src/mir/syntax.rs
@@ -913,7 +913,7 @@ pub enum Operand<'tcx> {
 static_assert_size!(Operand<'_>, 24);
 
 ///////////////////////////////////////////////////////////////////////////
-/// Rvalues
+// Rvalues
 
 /// The various kinds of rvalues that can appear in MIR.
 ///