diff --git a/lib/btc_wire_proto.rb b/lib/btc_wire_proto.rb
index 8474063..4bd92a1 100644
--- a/lib/btc_wire_proto.rb
+++ b/lib/btc_wire_proto.rb
@@ -132,7 +132,7 @@ module BtcWireProto
   # Variable-length integer. This is slightly scary.
   # @author Nick Thomas <nick@lupine.me.uk>
   class VarInt < BinData::BasePrimitive
-    register_self
+    register_self if BinData::VERSION < "1.3.2"
 
     def value_to_binary_string(val)
       val = val.to_i