diff --git a/Modules/ITS/include/ITS/ITSClusterTask.h b/Modules/ITS/include/ITS/ITSClusterTask.h
index 6122176fe4..f48ca10b1e 100644
--- a/Modules/ITS/include/ITS/ITSClusterTask.h
+++ b/Modules/ITS/include/ITS/ITSClusterTask.h
@@ -93,9 +93,9 @@ class ITSClusterTask : public TaskInterface
   std::shared_ptr<TH2DRatio> hAverageClusterSizeSummaryOB[NLayer];
 
   // Layer summary
-  TH1D* hClusterSizeLayerSummary[NLayer] = { nullptr };
-  TH1D* hClusterTopologyLayerSummary[NLayer] = { nullptr };
-  TH1D* hGroupedClusterSizeLayerSummary[NLayer] = { nullptr };
+  TH1L* hClusterSizeLayerSummary[NLayer] = { nullptr };
+  TH1L* hClusterTopologyLayerSummary[NLayer] = { nullptr };
+  TH1L* hGroupedClusterSizeLayerSummary[NLayer] = { nullptr };
 
   // Anomalies plots
   TH2D* hLongClustersPerChip[3] = { nullptr };
diff --git a/Modules/ITS/src/ITSClusterTask.cxx b/Modules/ITS/src/ITSClusterTask.cxx
index 4825f9b4cc..95748a528f 100644
--- a/Modules/ITS/src/ITSClusterTask.cxx
+++ b/Modules/ITS/src/ITSClusterTask.cxx
@@ -472,19 +472,19 @@ void ITSClusterTask::createAllHistos()
       hMultPerChipWhenLongClusters[iLayer]->SetStats(0);
     }
 
-    hClusterSizeLayerSummary[iLayer] = new TH1D(Form("Layer%d/AverageClusterSizeSummary", iLayer), Form("Layer%dAverageClusterSizeSummary", iLayer), 100, 0, 100);
+    hClusterSizeLayerSummary[iLayer] = new TH1L(Form("Layer%d/AverageClusterSizeSummary", iLayer), Form("Layer%dAverageClusterSizeSummary", iLayer), 128 * 128, 0, 128 * 128);
     hClusterSizeLayerSummary[iLayer]->SetTitle(Form("Cluster size summary for Layer %d", iLayer));
     addObject(hClusterSizeLayerSummary[iLayer]);
     formatAxes(hClusterSizeLayerSummary[iLayer], "Cluster Size (pixels)", "counts", 1, 1.10);
     hClusterSizeLayerSummary[iLayer]->SetStats(0);
 
-    hGroupedClusterSizeLayerSummary[iLayer] = new TH1D(Form("Layer%d/AverageGroupedClusterSizeSummary", iLayer), Form("Layer%dAverageGroupedClusterSizeSummary", iLayer), 100, 0, 100);
+    hGroupedClusterSizeLayerSummary[iLayer] = new TH1L(Form("Layer%d/AverageGroupedClusterSizeSummary", iLayer), Form("Layer%dAverageGroupedClusterSizeSummary", iLayer), 128 * 128, 0, 128 * 128);
     hGroupedClusterSizeLayerSummary[iLayer]->SetTitle(Form("Cluster size summary for Layer %d", iLayer));
     addObject(hGroupedClusterSizeLayerSummary[iLayer]);
     formatAxes(hGroupedClusterSizeLayerSummary[iLayer], "Grouped Cluster Size (pixels)", "counts", 1, 1.10);
     hGroupedClusterSizeLayerSummary[iLayer]->SetStats(0);
 
-    hClusterTopologyLayerSummary[iLayer] = new TH1D(Form("Layer%d/ClusterTopologySummary", iLayer), Form("Layer%dClusterTopologySummary", iLayer), 300, 0, 300);
+    hClusterTopologyLayerSummary[iLayer] = new TH1L(Form("Layer%d/ClusterTopologySummary", iLayer), Form("Layer%dClusterTopologySummary", iLayer), 300, 0, 300);
     hClusterTopologyLayerSummary[iLayer]->SetTitle(Form("Cluster topology summary for Layer %d", iLayer));
     addObject(hClusterTopologyLayerSummary[iLayer]);
     formatAxes(hClusterTopologyLayerSummary[iLayer], "Cluster Topology (ID)", "counts", 1, 1.10);