diff --git a/lib/net/ber/core_ext/true_class.rb b/lib/net/ber/core_ext/true_class.rb
index bf199d1e..41c81ec9 100644
--- a/lib/net/ber/core_ext/true_class.rb
+++ b/lib/net/ber/core_ext/true_class.rb
@@ -6,6 +6,6 @@ module Net::BER::Extensions::TrueClass
   # Converts +true+ to the BER wireline representation of +true+.
   def to_ber
     # http://tools.ietf.org/html/rfc4511#section-5.1
-    "\001\001\xFF".force_encoding("ASCII-8BIT")
+    "\001\001\xFF".b
   end
 end