diff --git a/src/miner.h b/src/miner.h
index 0be3152d9..96a6b70ec 100644
--- a/src/miner.h
+++ b/src/miner.h
@@ -14,7 +14,7 @@ class CBlockIndex;
 class CReserveKey;
 class CScript;
 class CWallet;
-namespace Consensus { class Params; };
+namespace Consensus { struct Params; };
 
 struct CBlockTemplate
 {