1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_expand/src/proc_macro_server.rs b/compiler/rustc_expand/src/proc_macro_server.rs
index 837fad90580..67edfe19da3 100644
--- a/compiler/rustc_expand/src/proc_macro_server.rs
+++ b/compiler/rustc_expand/src/proc_macro_server.rs
@@ -187,7 +187,7 @@ impl FromInternal<(TreeAndSpacing, &'_ ParseSess, &'_ mut Vec<Self>)>
                         delimiter: Delimiter::None,
                         stream,
                         span: DelimSpan::from_single(span),
-                        flatten: nt.pretty_printing_compatibility_hack(),
+                        flatten: crate::base::pretty_printing_compatibility_hack(&nt, sess),
                     })
                 }
             }