diff --git a/GPU/GPUTracking/Global/GPUChainTracking.cxx b/GPU/GPUTracking/Global/GPUChainTracking.cxx
index a8b4268b277be..89643bf0044a5 100644
--- a/GPU/GPUTracking/Global/GPUChainTracking.cxx
+++ b/GPU/GPUTracking/Global/GPUChainTracking.cxx
@@ -459,8 +459,8 @@ void GPUChainTracking::AllocateIOMemory()
     AllocateIOMemoryHelper(mIOPtrs.nSliceTracks[i], mIOPtrs.sliceTracks[i], mIOMem.sliceTracks[i]);
     AllocateIOMemoryHelper(mIOPtrs.nSliceClusters[i], mIOPtrs.sliceClusters[i], mIOMem.sliceClusters[i]);
   }
-  AllocateIOMemoryHelper(mIOMem.clusterNativeAccess->nClustersTotal, mIOMem.clusterNativeAccess->clustersLinear, mIOMem.clustersNative);
   mIOMem.clusterNativeAccess.reset(new ClusterNativeAccess);
+  AllocateIOMemoryHelper(mIOMem.clusterNativeAccess->nClustersTotal, mIOMem.clusterNativeAccess->clustersLinear, mIOMem.clustersNative);
   mIOPtrs.clustersNative = mIOMem.clusterNativeAccess->nClustersTotal ? mIOMem.clusterNativeAccess.get() : nullptr;
   AllocateIOMemoryHelper(mIOPtrs.nMCLabelsTPC, mIOPtrs.mcLabelsTPC, mIOMem.mcLabelsTPC);
   AllocateIOMemoryHelper(mIOPtrs.nMCInfosTPC, mIOPtrs.mcInfosTPC, mIOMem.mcInfosTPC);