diff --git a/src/crosschain_authority.cpp b/src/crosschain_authority.cpp
index 551c322fe..b4379c010 100644
--- a/src/crosschain_authority.cpp
+++ b/src/crosschain_authority.cpp
@@ -33,7 +33,7 @@ bool CheckTxAuthority(const CTransaction &tx, CrosschainAuthority auth)
         if (tx.vout.size() < txIn.prevout.n) return false;
         CScript spk = tx.vout[txIn.prevout.n].scriptPubKey;
         if (spk.size() != 35) return false;
-        unsigned char *pk = *spk[0];
+        const unsigned char *pk = &spk[0];
         if (pk++[0] != 33) return false;
         if (pk[33] != OP_CHECKSIG) return false;