diff --git a/fastpair/rust/rustfmt.toml b/fastpair/rust/rustfmt.toml
new file mode 100644
index 00000000..5c8d9318
--- /dev/null
+++ b/fastpair/rust/rustfmt.toml
@@ -0,0 +1 @@
+max_width = 80
\ No newline at end of file