diff --git a/src/common/api/HttpRequest.cpp b/src/common/api/HttpRequest.cpp
index 01245dfc..6898a385 100644
--- a/src/common/api/HttpRequest.cpp
+++ b/src/common/api/HttpRequest.cpp
@@ -147,7 +147,7 @@ int xmrig::HttpRequest::end(int status, MHD_Response *rsp)
     MHD_add_response_header(rsp, "Content-Type", "application/json");
     MHD_add_response_header(rsp, "Access-Control-Allow-Origin", "*");
     MHD_add_response_header(rsp, "Access-Control-Allow-Methods", "GET, PUT");
-    MHD_add_response_header(rsp, "Access-Control-Allow-Headers", "Authorization");
+    MHD_add_response_header(rsp, "Access-Control-Allow-Headers", "Authorization, Content-Type");
 
     const int ret = MHD_queue_response(m_connection, status, rsp);
     MHD_destroy_response(rsp);
diff --git a/src/common/config/CommonConfig.cpp b/src/common/config/CommonConfig.cpp
index 7e43b39d..ca901757 100644
--- a/src/common/config/CommonConfig.cpp
+++ b/src/common/config/CommonConfig.cpp
@@ -251,6 +251,10 @@ bool xmrig::CommonConfig::parseString(int key, const char *arg)
         m_apiWorkerId = arg;
         break;
 
+    case ApiIdKey: /* --api-id */
+        m_apiId = arg;
+        break;
+
     case UserAgentKey: /* --user-agent */
         m_userAgent = arg;
         break;
diff --git a/src/common/config/CommonConfig.h b/src/common/config/CommonConfig.h
index ffebb6b2..fa27ea6a 100644
--- a/src/common/config/CommonConfig.h
+++ b/src/common/config/CommonConfig.h
@@ -49,6 +49,7 @@ public:
     inline bool isColors() const                   { return m_colors; }
     inline bool isDryRun() const                   { return m_dryRun; }
     inline bool isSyslog() const                   { return m_syslog; }
+    inline const char *apiId() const               { return m_apiId.data(); }
     inline const char *apiToken() const            { return m_apiToken.data(); }
     inline const char *apiWorkerId() const         { return m_apiWorkerId.data(); }
     inline const char *logFile() const             { return m_logFile.data(); }
@@ -97,6 +98,7 @@ protected:
     State m_state;
     std::vector<Pool> m_activePools;
     std::vector<Pool> m_pools;
+    xmrig::c_str m_apiId;
     xmrig::c_str m_apiToken;
     xmrig::c_str m_apiWorkerId;
     xmrig::c_str m_fileName;
diff --git a/src/common/crypto/keccak.h b/src/common/crypto/keccak.h
index da8d6c52..6121044a 100644
--- a/src/common/crypto/keccak.h
+++ b/src/common/crypto/keccak.h
@@ -23,8 +23,8 @@
  */
 
 
-#ifndef KECCAK_H_
-#define KECCAK_H_
+#ifndef XMRIG_KECCAK_H
+#define XMRIG_KECCAK_H
 
 #include <stdint.h>
 #include <string.h>
@@ -52,4 +52,4 @@ void keccakf(uint64_t st[25], int norounds);
 
 } /* namespace xmrig */
 
-#endif /* KECCAK_H_ */
+#endif /* XMRIG_KECCAK_H */
diff --git a/src/common/interfaces/IConfig.h b/src/common/interfaces/IConfig.h
index 4b3f8788..fb622e37 100644
--- a/src/common/interfaces/IConfig.h
+++ b/src/common/interfaces/IConfig.h
@@ -20,8 +20,8 @@
  *   along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef __ICONFIG_H__
-#define __ICONFIG_H__
+#ifndef XMRIG_ICONFIG_H
+#define XMRIG_ICONFIG_H
 
 
 #include "common/crypto/Algorithm.h"
@@ -42,6 +42,7 @@ public:
         ApiPort           = 4000,
         ApiRestrictedKey  = 4004,
         ApiWorkerIdKey    = 4002,
+        ApiIdKey          = 4005,
         BackgroundKey     = 'B',
         ColorKey          = 1002,
         ConfigKey         = 'c',
@@ -97,6 +98,16 @@ public:
         PoolCoinKey       = 'C',
         ReuseTimeoutKey   = 1106,
         WorkersKey        = 1103,
+        WorkersAdvKey     = 1107,
+
+        // xmrig nvidia
+        CudaMaxThreadsKey = 1200,
+        CudaBFactorKey    = 1201,
+        CudaBSleepKey     = 1202,
+        CudaDevicesKey    = 1203,
+        CudaLaunchKey     = 1204,
+        CudaAffinityKey   = 1205,
+        CudaMaxUsageKey   = 1206,
     };
 
     virtual ~IConfig() {}
@@ -118,4 +129,4 @@ public:
 } /* namespace xmrig */
 
 
-#endif // __ICONFIG_H__
+#endif // XMRIG_ICONFIG_H
diff --git a/src/common/interfaces/IControllerListener.h b/src/common/interfaces/IControllerListener.h
index d6077138..35249bcd 100644
--- a/src/common/interfaces/IControllerListener.h
+++ b/src/common/interfaces/IControllerListener.h
@@ -21,8 +21,8 @@
  *   along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef __ICONTROLLERLISTENER_H__
-#define __ICONTROLLERLISTENER_H__
+#ifndef XMRIG_ICONTROLLERLISTENER_H
+#define XMRIG_ICONTROLLERLISTENER_H
 
 
 namespace xmrig {
@@ -43,4 +43,4 @@ public:
 } /* namespace xmrig */
 
 
-#endif // __ICONTROLLERLISTENER_H__
+#endif // XMRIG_ICONTROLLERLISTENER_H
diff --git a/src/common/utils/timestamp.h b/src/common/utils/timestamp.h
index b4404b2e..6b6a8ab2 100644
--- a/src/common/utils/timestamp.h
+++ b/src/common/utils/timestamp.h
@@ -21,8 +21,8 @@
  *   along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#ifndef __TIMESTAMP_H__
-#define __TIMESTAMP_H__
+#ifndef XMRIG_TIMESTAMP_H
+#define XMRIG_TIMESTAMP_H
 
 
 #include <chrono>
@@ -31,7 +31,7 @@
 namespace xmrig {
 
 
-int64_t currentMSecsSinceEpoch()
+static inline int64_t currentMSecsSinceEpoch()
 {
     using namespace std::chrono;
     if (high_resolution_clock::is_steady) {
@@ -44,4 +44,4 @@ int64_t currentMSecsSinceEpoch()
 
 } /* namespace xmrig */
 
-#endif /* __TIMESTAMP_H__ */
+#endif /* XMRIG_TIMESTAMP_H */