diff --git a/GPU/GPUTracking/Global/GPUChainTrackingClusterizer.cxx b/GPU/GPUTracking/Global/GPUChainTrackingClusterizer.cxx
index 170e03b00eee4..750cbee7051bf 100644
--- a/GPU/GPUTracking/Global/GPUChainTrackingClusterizer.cxx
+++ b/GPU/GPUTracking/Global/GPUChainTrackingClusterizer.cxx
@@ -280,7 +280,7 @@ GPUTPCExtraADC GenerateSaturatedSignals(size_t seed = 42)
   const int32_t lastTB = 4000 - MaxTailLength; // Don't allow cut off tails at fragment borders
   const int32_t tailADC = 250;                 // charge should decrease over time, but for now just hardcode ADC above the threshold
 
-  std::mt19937 gen{seed};
+  std::mt19937 gen{(uint32_t)seed};
   std::uniform_int_distribution<> randomRow(0, GPUTPCGeometry::NROWS - 1);
   std::uniform_int_distribution<> randomTB(firstTB, lastTB);
   std::uniform_int_distribution<> randomTailLength(MinTailLength, MaxTailLength);
diff --git a/GPU/GPUTracking/TPCClusterFinder/GPUTPCCFMCLabelFlattener.cxx b/GPU/GPUTracking/TPCClusterFinder/GPUTPCCFMCLabelFlattener.cxx
index bffe4c041388c..3248185a8be00 100644
--- a/GPU/GPUTracking/TPCClusterFinder/GPUTPCCFMCLabelFlattener.cxx
+++ b/GPU/GPUTracking/TPCClusterFinder/GPUTPCCFMCLabelFlattener.cxx
@@ -53,13 +53,13 @@ GPUd() void GPUTPCCFMCLabelFlattener::Thread<GPUTPCCFMCLabelFlattener::setRowOff
   // but HIP clusters don't support MC labels yet and containers are missing for those clusters.
   // So append empty label container for each HIP cluster.
   // Note: This assumes that HIP cluster are store behind regular clusters!
-  auto &labels = clusterer.mPlabelsByRow[row].data;
+  auto& labels = clusterer.mPlabelsByRow[row].data;
   labels.resize(std::max(labels.size(), clusterInRow));
 
   uint32_t labelCount = 0;
 
   for (size_t i = 0; i < clusterInRow; i++) {
-    auto& interim = clusterer.mPlabelsByRow[row].data[i];
+    auto& interim = labels[i];
     labelCount += interim.labels.size();
   }