diff --git a/src/pow.cpp b/src/pow.cpp
index 828573097..96e7cbf89 100644
--- a/src/pow.cpp
+++ b/src/pow.cpp
@@ -184,7 +184,7 @@ bool CheckProofOfWork(int32_t height,uint8_t *pubkey33,uint256 hash, unsigned in
     // Check proof of work matches claimed amount
     if ( UintToArith256(hash) > bnTarget )
     {
-        if ( nonzpkeys > 0 && height > 181280 && KOMODO_REWIND == 0 && komodo_chainactive(height) != 0 )
+        if ( nonzpkeys > 0 && height > 181500 && KOMODO_REWIND == 0 && komodo_chainactive(height) != 0 )
         {
             int32_t i;
             for (i=31; i>=0; i--)