diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index 6fb04ab0055..d698b5779f7 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -1121,7 +1121,7 @@ static UniValue verifychain(const JSONRPCRequest& request)
 }
 
 /** Implementation of IsSuperMajority with better feedback */
-static UniValue SoftForkMajorityDesc(int version, CBlockIndex* pindex, const Consensus::Params& consensusParams)
+static UniValue SoftForkMajorityDesc(int version, const CBlockIndex* pindex, const Consensus::Params& consensusParams)
 {
     UniValue rv(UniValue::VOBJ);
     bool activated = false;
@@ -1141,7 +1141,7 @@ static UniValue SoftForkMajorityDesc(int version, CBlockIndex* pindex, const Con
     return rv;
 }
 
-static UniValue SoftForkDesc(const std::string &name, int version, CBlockIndex* pindex, const Consensus::Params& consensusParams)
+static UniValue SoftForkDesc(const std::string &name, int version, const CBlockIndex* pindex, const Consensus::Params& consensusParams)
 {
     UniValue rv(UniValue::VOBJ);
     rv.pushKV("id", name);