diff --git a/src/checkpoints.h b/src/checkpoints.h
index 001e3cc80..f4c3992ba 100644
--- a/src/checkpoints.h
+++ b/src/checkpoints.h
@@ -25,6 +25,7 @@ struct CCheckpointData {
     int64_t nTransactionsLastCheckpoint;
     double fTransactionsPerDay;
 };
+    bool CheckBlock(const CCheckpointData& data, int nHeight, const uint256& hash);
 
 //! Return conservative estimate of total number of blocks, 0 if unknown
 int GetTotalBlocksEstimate(const CCheckpointData& data);