1 files changed, 2 insertions, 0 deletions
diff --git a/src/validation.h b/src/validation.h
index 51ea18722c..7a45595283 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -39,6 +39,7 @@ class CChainParams;
 class CInv;
 class CConnman;
 class CScriptCheck;
+class CBlockPolicyEstimator;
 class CTxMemPool;
 class CValidationInterface;
 class CValidationState;
@@ -152,6 +153,7 @@ struct BlockHasher
 
 extern CScript COINBASE_FLAGS;
 extern CCriticalSection cs_main;
+extern CBlockPolicyEstimator feeEstimator;
 extern CTxMemPool mempool;
 typedef boost::unordered_map<uint256, CBlockIndex*, BlockHasher> BlockMap;
 extern BlockMap mapBlockIndex;