diff --git a/C++/source/idgen/IdGenerator.h b/C++/source/idgen/IdGenerator.h
index 25e3961..98be61e 100644
--- a/C++/source/idgen/IdGenerator.h
+++ b/C++/source/idgen/IdGenerator.h
@@ -213,7 +213,7 @@ namespace idgen
 
         int64_t CalcTurnBackId()
         {
-            uint64_t result = (_SnowFlakeWorker._LastTimeTick << _SnowFlakeWorker._TimestampShift) | (_SnowFlakeWorker.WorkerId << _SnowFlakeWorker.SeqBitLength) |
+            uint64_t result = (_SnowFlakeWorker._TurnBackTimeTick << _SnowFlakeWorker._TimestampShift) | (_SnowFlakeWorker.WorkerId << _SnowFlakeWorker.SeqBitLength) |
                               (_SnowFlakeWorker._TurnBackIndex);
             _SnowFlakeWorker._TurnBackTimeTick--;
             return result;
diff --git a/C/source/idgen/SnowWorkerM1.c b/C/source/idgen/SnowWorkerM1.c
index a990010..f049de7 100644
--- a/C/source/idgen/SnowWorkerM1.c
+++ b/C/source/idgen/SnowWorkerM1.c
@@ -112,7 +112,7 @@ static inline int64_t CalcId(SnowFlakeWorker *worker) {
 }
 
 static inline int64_t CalcTurnBackId(SnowFlakeWorker *worker) {
-    uint64_t result = (worker->_LastTimeTick << worker->_TimestampShift) | (worker->WorkerId << worker->SeqBitLength) |
+    uint64_t result = (worker->_TurnBackTimeTick << worker->_TimestampShift) | (worker->WorkerId << worker->SeqBitLength) |
                       (worker->_TurnBackIndex);
     worker->_TurnBackTimeTick--;
     return result;
diff --git a/PHP/src/snowflake/snowflake.c b/PHP/src/snowflake/snowflake.c
index 4d50e82..af5cede 100644
--- a/PHP/src/snowflake/snowflake.c
+++ b/PHP/src/snowflake/snowflake.c
@@ -261,7 +261,7 @@ static inline uint64_t CalcId(snowflake *flake)
 
 static inline uint64_t CalcTurnBackId(snowflake *flake)
 {
-	uint64_t result = (flake->_LastTimeTick << flake->_TimestampShift) + (flake->WorkerId << flake->SeqBitLength) + (flake->_TurnBackIndex );
+	uint64_t result = (flake->_TurnBackTimeTick << flake->_TimestampShift) + (flake->WorkerId << flake->SeqBitLength) + (flake->_TurnBackIndex );
 	flake->_TurnBackTimeTick--;
 	return result;
 }