diff --git a/src/formatting/expr.rs b/src/formatting/expr.rs
index b53496affa8..61937aeee3f 100644
--- a/src/formatting/expr.rs
+++ b/src/formatting/expr.rs
@@ -124,6 +124,9 @@ pub(crate) fn format_expr(
         | ast::ExprKind::Loop(..)
         | ast::ExprKind::While(..) => to_control_flow(expr, expr_type)
             .and_then(|control_flow| control_flow.rewrite(context, shape)),
+        ast::ExprKind::ConstBlock(ref anon_const) => {
+            Some(format!("const {}", anon_const.rewrite(context, shape)?))
+        }
         ast::ExprKind::Block(ref block, opt_label) => {
             match expr_type {
                 ExprType::Statement => {
diff --git a/src/formatting/utils.rs b/src/formatting/utils.rs
index f3484020b05..01d4c4b202f 100644
--- a/src/formatting/utils.rs
+++ b/src/formatting/utils.rs
@@ -482,6 +482,7 @@ pub(crate) fn is_block_expr(context: &RewriteContext<'_>, expr: &ast::Expr, repr
         | ast::ExprKind::While(..)
         | ast::ExprKind::If(..)
         | ast::ExprKind::Block(..)
+        | ast::ExprKind::ConstBlock(..)
         | ast::ExprKind::Async(..)
         | ast::ExprKind::Loop(..)
         | ast::ExprKind::ForLoop(..)