diff --git a/lib/postgres-pr/typeconv/bytea.rb b/lib/postgres-pr/typeconv/bytea.rb
index 7c43ac9..132bb99 100644
--- a/lib/postgres-pr/typeconv/bytea.rb
+++ b/lib/postgres-pr/typeconv/bytea.rb
@@ -1,3 +1,5 @@
+# encoding: US-ASCII
+
 module Postgres::Conversion
 
   #