diff --git a/src/main.cpp b/src/main.cpp
index e9c50b8be..e7af30c37 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2051,8 +2051,7 @@ void static UpdateTip(CBlockIndex *pindexNew) {
         const CBlockIndex* pindex = chainActive.Tip();
         for (int i = 0; i < 100 && pindex != NULL; i++)
         {
-            if (pindex->nVersion > CBlock::CURRENT_VERSION &&
-                (pindex->nVersion & ~BLOCK_VERSION_AUXPOW) != (CBlockHeader::CURRENT_VERSION | (AUXPOW_CHAIN_ID * BLOCK_VERSION_CHAIN_START)))
+            if ((pindex->nVersion & 0xff) > CBlock::CURRENT_VERSION)
                 ++nUpgraded;
             pindex = pindex->pprev;
         }