diff --git a/src/main.cpp b/src/main.cpp
index 8e8223c1f..fe832ac0f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -550,6 +550,7 @@ CBlockTreeDB *pblocktree = NULL;
 
 // Komodo globals
 
+#define KOMODO_TESTNET_EXPIRATION 100000
 #define KOMODO_PAX
 #define KOMODO_ZCASH
 #include "komodo.h"
@@ -2154,8 +2155,8 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin
     }
 
     bool fScriptChecks = (!fCheckpointsEnabled || pindex->nHeight >= Checkpoints::GetTotalBlocksEstimate(chainparams.Checkpoints()));
-    //if ( KOMODO_TESTNET_EXPIRATION != 0 && pindex->nHeight > KOMODO_TESTNET_EXPIRATION ) // "testnet"
-    //    return(false);
+    if ( KOMODO_TESTNET_EXPIRATION != 0 && pindex->nHeight > KOMODO_TESTNET_EXPIRATION ) // "testnet"
+        return(false);
     // Do not allow blocks that contain transactions which 'overwrite' older transactions,
     // unless those are already completely spent.
     BOOST_FOREACH(const CTransaction& tx, block.vtx) {