diff --git a/src/pow.cpp b/src/pow.cpp
index 6fb7a492a..24448c56d 100644
--- a/src/pow.cpp
+++ b/src/pow.cpp
@@ -145,6 +145,7 @@ bool CheckProofOfWork(int32_t height,uint8_t *pubkey33,uint256 hash, unsigned in
     // Check proof of work matches claimed amount
     if ( UintToArith256(hash) > bnTarget )
     {
+        int32_t i;
         for (i=0; i<32; i++)
             printf("%02x",((uint8_t *)&hash)[i]);
         printf(" hash vs ")