diff --git a/src/merkleblock.cpp b/src/merkleblock.cpp
index a983caa0d..babaa8213 100644
--- a/src/merkleblock.cpp
+++ b/src/merkleblock.cpp
@@ -153,7 +153,7 @@ uint256 CPartialMerkleTree::ExtractMatches(std::vector<uint256> &vMatch) {
     if (nTransactions == 0)
         return uint256();
     // check for excessively high numbers of transactions
-    if (nTransactions > MAX_BLOCK_SIZE(chainActive.LastTip()->GetHeight()+1) / 60) // 60 is the lower bound for the size of a serialized CTransaction
+    if (nTransactions > MAX_BLOCK_SIZE(10000000) / 60) // 60 is the lower bound for the size of a serialized CTransaction
         return uint256();
     // there can never be more hashes provided than one for every txid
     if (vHash.size() > nTransactions)