diff --git a/iguana/iguana777.h b/iguana/iguana777.h
index 39345b4ff..37b655317 100755
--- a/iguana/iguana777.h
+++ b/iguana/iguana777.h
@@ -23,7 +23,7 @@
 typedef int32_t (*blockhashfunc)(uint8_t *blockhashp,uint8_t *serialized,int32_t len);
 
 #define IGUANA_MAXSCRIPTSIZE 10001
-//#define IGUANA_SERIALIZE_SPENDVECTORGEN
+#define IGUANA_SERIALIZE_SPENDVECTORGEN
 //#define IGUANA_SERIALIZE_BALANCEGEN
 //#define IGUANA_DISABLEPEERS
 #define _IGUANA_MAXSTUCKTIME 77