diff --git a/src/rpc/protocol.h b/src/rpc/protocol.h
index 4a265735d25..6954aed252f 100644
--- a/src/rpc/protocol.h
+++ b/src/rpc/protocol.h
@@ -46,7 +46,6 @@ enum RPCErrorCode
 
     //! General application defined errors
     RPC_MISC_ERROR                  = -1,  //!< std::exception thrown in command handling
-    RPC_FORBIDDEN_BY_SAFE_MODE      = -2,  //!< Server is in safe mode, and command is not allowed in safe mode
     RPC_TYPE_ERROR                  = -3,  //!< Unexpected type was passed as parameter
     RPC_INVALID_ADDRESS_OR_KEY      = -5,  //!< Invalid address or key
     RPC_OUT_OF_MEMORY               = -7,  //!< Ran out of memory during operation
@@ -88,6 +87,9 @@ enum RPCErrorCode
 
     //! Backwards compatible aliases
     RPC_WALLET_INVALID_ACCOUNT_NAME = RPC_WALLET_INVALID_LABEL_NAME,
+
+    //! Unused reserved codes, kept around for backwards compatibility. Do not reuse.
+    RPC_FORBIDDEN_BY_SAFE_MODE      = -2,  //!< Server is in safe mode, and command is not allowed in safe mode
 };
 
 UniValue JSONRPCRequestObj(const std::string& strMethod, const UniValue& params, const UniValue& id);