diff --git a/.cargo/config.toml b/.cargo/config.toml
index b15ae6c3b..ab4522146 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -5,6 +5,7 @@ rustflags = [
 
     # High-risk code
     "-Dunsafe_code",
+    "-Dnon_ascii_idents",
 
     # Potential bugs
     #