diff --git a/src/importcoin.cpp b/src/importcoin.cpp
index d7d75290c..e83a71add 100644
--- a/src/importcoin.cpp
+++ b/src/importcoin.cpp
@@ -104,7 +104,7 @@ bool VerifyCoinImport(const CScript& scriptSig, TransactionSignatureChecker& che
 void AddImportTombstone(const CTransaction &importTx, CCoinsViewCache &inputs, int nHeight)
 {
     uint256 burnHash = importTx.vin[0].prevout.hash;
-    fprintf(stderr,"add tombstone.(%s)\n",burnHash.GetHex());
+    fprintf(stderr,"add tombstone.(%s)\n",burnHash.GetHex().c_str());
     CCoinsModifier modifier = inputs.ModifyCoins(burnHash);
     modifier->nHeight = nHeight;
     modifier->nVersion = 4;//1;
@@ -115,6 +115,7 @@ void AddImportTombstone(const CTransaction &importTx, CCoinsViewCache &inputs, i
 void RemoveImportTombstone(const CTransaction &importTx, CCoinsViewCache &inputs)
 {
     uint256 burnHash = importTx.vin[0].prevout.hash;
+    fprintf(stderr,"remove tombstone.(%s)\n",burnHash.GetHex().c_str());
     inputs.ModifyCoins(burnHash)->Clear();
 }
 
@@ -122,6 +123,6 @@ void RemoveImportTombstone(const CTransaction &importTx, CCoinsViewCache &inputs
 int ExistsImportTombstone(const CTransaction &importTx, const CCoinsViewCache &inputs)
 {
     uint256 burnHash = importTx.vin[0].prevout.hash;
-    fprintf(stderr,"check tombstone.(%s)\n",burnHash.GetHex());
+    fprintf(stderr,"check tombstone.(%s) in %s\n",burnHash.GetHex().c_str(),importTx.GetHash().GetHex().c_str());
     return inputs.HaveCoins(burnHash);
 }