diff --git a/src/main.cpp b/src/main.cpp
index 45e617a9c..3cf45b287 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1070,7 +1070,10 @@ bool AcceptToMemoryPool(CTxMemPool& pool, CValidationState &state, const CTransa
     // is it already in the memory pool?
     uint256 hash = tx.GetHash();
     if (pool.exists(hash))
+    {
+        fprintf(stderr,"already in mempool\n");
         return false;
+    }
 
     // Check for conflicts with in-memory transactions
     {