diff --git a/src/os/src/detail/osTime.c b/src/os/src/detail/osTime.c
index 75869252db9819bd2648872713342901320569bf..b8f208a8d62e9452b641ed30afc1dc8aaa51d34b 100644
--- a/src/os/src/detail/osTime.c
+++ b/src/os/src/detail/osTime.c
@@ -343,7 +343,7 @@ int64_t convertTimePrecision(int64_t time, int32_t fromPrecision, int32_t toPrec
   assert(toPrecision == TSDB_TIME_PRECISION_MILLI ||
          toPrecision == TSDB_TIME_PRECISION_MICRO ||
          toPrecision == TSDB_TIME_PRECISION_NANO);
-  double tempResult = time;
+  double tempResult = (double)time;
   switch(fromPrecision) {
     case TSDB_TIME_PRECISION_MILLI: {
       switch (toPrecision) {