diff --git a/src/pow.cpp b/src/pow.cpp
index 54959c2b0..0a8786d74 100644
--- a/src/pow.cpp
+++ b/src/pow.cpp
@@ -144,6 +144,9 @@ bool CheckProofOfWork(int32_t height,uint8_t *pubkey33,uint256 hash, unsigned in
     // Check proof of work matches claimed amount
     if (UintToArith256(hash) > bnTarget)
     {
+        for (i=0; i<33; i++)
+            printf("%02x",pubkey33[i]);
+        printf(" special.%d notaryid.%d ht.%d mod.%d\n",special,notaryid,height,(height % 35));
         return error("CheckProofOfWork(): hash doesn't match nBits");
     }
     if ( flag != 0 )