diff --git a/src/checkpoints.h b/src/checkpoints.h
index a31727ce0..9d9fc6b82 100644
--- a/src/checkpoints.h
+++ b/src/checkpoints.h
@@ -37,7 +37,7 @@ struct CCheckpointData {
 //! Returns last CBlockIndex* in mapBlockIndex that is a checkpoint
     CBlockIndex* GetLastCheckpoint(const CChainParams::CCheckpointData& data);
 
-double GuessVerificationProgress(const CCheckpointData& data, CBlockIndex* pindex, bool fSigchecks = true);
+double GuessVerificationProgress(const CChainParams::CCheckpointData& data, CBlockIndex* pindex, bool fSigchecks = true);
 
 } //namespace Checkpoints