diff --git a/iguana/coins/genbtc b/iguana/coins/genbtc
index 9ffd8b2f1..4179c8fea 100755
--- a/iguana/coins/genbtc
+++ b/iguana/coins/genbtc
@@ -1 +1 @@
-curl --url "http://127.0.0.1:7778" --data "{\"prefetchlag\":11,\"poll\":1,\"active\":1,\"agent\":\"iguana\",\"method\":\"addcoin\",\"newcoin\":\"BTC\",\"startpend\":64,\"endpend\":64,\"services\":129,\"maxpeers\":512,\"RELAY\":1,\"VALIDATE\":1,\"portp2p\":8333}"
+curl --url "http://127.0.0.1:7778" --data "{\"prefetchlag\":-1,\"poll\":1,\"active\":1,\"agent\":\"iguana\",\"method\":\"addcoin\",\"newcoin\":\"BTC\",\"startpend\":64,\"endpend\":64,\"services\":129,\"maxpeers\":512,\"RELAY\":1,\"VALIDATE\":1,\"portp2p\":8333}"
diff --git a/iguana/coins/genbtc.json b/iguana/coins/genbtc.json
index 94931216a..c2b0314d6 100755
--- a/iguana/coins/genbtc.json
+++ b/iguana/coins/genbtc.json
@@ -1 +1 @@
-{"numhelpers":1,"prefetchlag":11,"poll":1,"active":1,"agent":"iguana","method":"addcoin","newcoin":"BTC","startpend":16,"endpend":16,"services":129,"maxpeers":512,"RELAY":1,"VALIDATE":1,"portp2p":8333}
+{"numhelpers":1,"prefetchlag":-1,"poll":1,"active":1,"agent":"iguana","method":"addcoin","newcoin":"BTC","startpend":16,"endpend":16,"services":129,"maxpeers":512,"RELAY":1,"VALIDATE":1,"portp2p":8333}