diff --git a/LivoxPacketInterpreters/vtkLivoxPacketInterpreter.cxx b/LivoxPacketInterpreters/vtkLivoxPacketInterpreter.cxx
index 116869ed9b1c46c0e932e3a4a272fc06cd9e079f..55f48beaf29a54125099cb1b8c7c38b4bbb9c1fb 100644
--- a/LivoxPacketInterpreters/vtkLivoxPacketInterpreter.cxx
+++ b/LivoxPacketInterpreters/vtkLivoxPacketInterpreter.cxx
@@ -75,7 +75,7 @@ public:
 
   //-----------------------------------------------------------------------------
   template <typename T>
-  void FillPoints(double* pos, const T& point, double timestamp, int laserId)
+  void FillPoints(double* pos, const T& point, double timestamp, uint8_t laserId)
   {
     if (std::isnan(pos[0]) || std::isnan(pos[1]) || std::isnan(pos[2]))
     {
@@ -117,7 +117,7 @@ public:
         static_cast<double>(points[i].y) / 1000,
         static_cast<double>(points[i].z) / 1000 };
       uint64_t ptsTimestamp = GetEthPacketTimestamp(pkt->timestamp, 8) + i * pkt->time_interval;
-      auto laserId = i % 4;
+      uint8_t laserId = i % 4;
       this->FillPoints(pos, points[i], ptsTimestamp, laserId);
     }
   }
@@ -135,7 +135,7 @@ public:
         static_cast<double>(points[i].y) / 100,
         static_cast<double>(points[i].z) / 100 };
       uint64_t ptsTimestamp = GetEthPacketTimestamp(pkt->timestamp, 8) + i * pkt->time_interval;
-      auto laserId = i % 4;
+      uint8_t laserId = i % 4;
       this->FillPoints(pos, points[i], ptsTimestamp, laserId);
     }
   }
@@ -156,7 +156,7 @@ public:
       pos[1] = rho * std::sin(phi) * std::sin(theta);
       pos[2] = rho * std::cos(phi);
       uint64_t ptsTimestamp = GetEthPacketTimestamp(pkt->timestamp, 8) + i * pkt->time_interval;
-      auto laserId = i % 4;
+      uint8_t laserId = i % 4;
       this->FillPoints(pos, points[i], ptsTimestamp, laserId);
     }
   }
@@ -242,7 +242,7 @@ vtkSmartPointer<vtkPolyData> vtkLivoxPacketInterpreter::CreateNewEmptyFrame(vtkI
   InitArrayForPolyData(true, internals->PointsZ, "Z", nbrOfPoints, prereservedNbrOfPoints, polyData, this->EnableAdvancedArrays);
   InitArrayForPolyData(false, internals->Intensity, "intensity", nbrOfPoints, prereservedNbrOfPoints, polyData);
   InitArrayForPolyData(false, internals->Timestamp, "timestamp", nbrOfPoints, prereservedNbrOfPoints, polyData);
-  InitArrayForPolyData(false, internals->LaserId,   "laser_id",  nbrOfPoints, prereservedNbrOfPoints, polyData);
+  InitArrayForPolyData(false, internals->LaserId, "laser_id", nbrOfPoints, prereservedNbrOfPoints, polyData);
   InitArrayForPolyData(false, internals->Distance, "distance_m", nbrOfPoints, prereservedNbrOfPoints, polyData);
   InitArrayForPolyData(true, internals->TagGlue, "tag_glue", nbrOfPoints, prereservedNbrOfPoints, polyData, this->EnableAdvancedArrays);
   InitArrayForPolyData(true, internals->TagParticles, "tag_particles", nbrOfPoints, prereservedNbrOfPoints, polyData, this->EnableAdvancedArrays);