diff --git a/src/main.cpp b/src/main.cpp
index f6d6ca270..786de3397 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3243,7 +3243,8 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin
     uint256 hashPrevBlock = pindex->pprev == NULL ? uint256() : pindex->pprev->GetBlockHash();
     if ( hashPrevBlock != view.GetBestBlock() )
     {
-        fprintf(stderr,"ConnectBlock(): hashPrevBlock != view.GetBestBlock()\n");
+        fprintf(stderr,"ConnectBlock(): hashPrevBlock != view.GetBestBlock() %s != %s\n", hashPrevBlock.ToString().c_str(), view.GetBestBlock().ToString().c_str() );
+
         return state.DoS(1, error("ConnectBlock(): hashPrevBlock != view.GetBestBlock()"),
                          REJECT_INVALID, "hashPrevBlock-not-bestblock");
     }