diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index 8f446aee652..e2e244a5f13 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -43,7 +43,6 @@ static std::condition_variable cond_blockchange;
 static CUpdatedBlock latestblock;
 
 extern void TxToJSON(const CTransaction& tx, const uint256 hashBlock, UniValue& entry);
-void ScriptPubKeyToJSON(const CScript& scriptPubKey, UniValue& out, bool fIncludeHex);
 
 double GetDifficulty(const CBlockIndex* blockindex)
 {