diff --git a/src/rust/.rustfmt.toml b/src/rust/.rustfmt.toml
new file mode 100644
index 00000000000..f25bd51883e
--- /dev/null
+++ b/src/rust/.rustfmt.toml
@@ -0,0 +1,2 @@
+max_width = 80
+comment_width = 80