1 files changed, 5 insertions, 0 deletions
diff --git a/src/miner.cpp b/src/miner.cpp
index 280349e8c2..2eb028b1d3 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -83,6 +83,11 @@ CBlockTemplate* CreateNewBlock(const CScript& scriptPubKeyIn)
         return NULL;
     CBlock *pblock = &pblocktemplate->block; // pointer for convenience
 
+    // -regtest only: allow overriding block.nVersion with
+    // -blockversion=N to test forking scenarios
+    if (Params().MineBlocksOnDemand())
+        pblock->nVersion = GetArg("-blockversion", pblock->nVersion);
+
     // Create coinbase tx
     CMutableTransaction txNew;
     txNew.vin.resize(1);