diff --git a/src/main.cpp b/src/main.cpp
index 1d7a6f8b1..e0b2ec8bc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3634,7 +3634,7 @@ bool ConnectBlock(const CBlock& block, CValidationState& state, CBlockIndex* pin
         return true;
 
     // Write undo information to disk
-    fprintf(stderr,"nFile.%d isNull %d vs isvalid %d nStatus %x\n",(int32_t)pindex->nFile,pindex->GetUndoPos().IsNull(),pindex->IsValid(BLOCK_VALID_SCRIPTS),(uint32_t)pindex->nStatus);
+    //fprintf(stderr,"nFile.%d isNull %d vs isvalid %d nStatus %x\n",(int32_t)pindex->nFile,pindex->GetUndoPos().IsNull(),pindex->IsValid(BLOCK_VALID_SCRIPTS),(uint32_t)pindex->nStatus);
     if (pindex->GetUndoPos().IsNull() || !pindex->IsValid(BLOCK_VALID_SCRIPTS))
     {
         if (pindex->GetUndoPos().IsNull())