diff --git a/iguana/iguana777.h b/iguana/iguana777.h
index 776773a13..fcf904ead 100755
--- a/iguana/iguana777.h
+++ b/iguana/iguana777.h
@@ -16,6 +16,11 @@
 #ifndef iguana777_net_h
 #define iguana777_net_h
 
+#if (defined(_WIN32) || defined(__WIN32__)) && \
+!defined(WIN32) && !defined(__SYMBIAN32__)
+#define WIN32
+#endif
+
 //#define BTC2_VERSION
 #define BTC2_HARDFORK_HEIGHT 444444
 #define BTC2_SIGHASH_FORKID 0xcf
diff --git a/iguana/iguana_ramchain.c b/iguana/iguana_ramchain.c
index 69d64c3b1..e14262c0a 100755
--- a/iguana/iguana_ramchain.c
+++ b/iguana/iguana_ramchain.c
@@ -167,8 +167,10 @@ int32_t iguana_peerfile_exists(struct iguana_info *coin,struct iguana_peer *addr
 uint32_t iguana_ramchain_addtxid(struct iguana_info *coin,RAMCHAIN_FUNC,bits256 txid,int32_t numvouts,int32_t numvins,uint32_t locktime,uint32_t version,uint32_t timestamp,int16_t bundlei)
 {
     uint32_t txidind; struct iguana_txid *t; struct iguana_kvitem *ptr; struct iguana_ramchaindata *rdata;
+#ifndef WIN32
     if ( sizeof(*t) != 64 )
         printf("sizeof iguana_txid.%d != 64?\n",(int32_t)sizeof(*t));
+#endif
     txidind = ramchain->H.txidind;
     t = &T[txidind];
     if ( ramchain->H.ROflag != 0 )