diff --git a/.rustfmt.toml b/.rustfmt.toml
index 7b1f8212c..6455f16cd 100644
--- a/.rustfmt.toml
+++ b/.rustfmt.toml
@@ -6,3 +6,5 @@ use_small_heuristics = "Max"
 group_imports = "StdExternalCrate"
 format_code_in_doc_comments = true
 doc_comment_code_block_width = 80
+# Workaround for https://github.com/rust-lang/rust.vim/issues/464
+edition = "2021"