2 files changed, 5 insertions, 1 deletions
diff --git a/src/client/northstar/dash-fields/HistogramField.ts b/src/client/northstar/dash-fields/HistogramField.ts
index f939ccd83..fa2a9c008 100644
--- a/src/client/northstar/dash-fields/HistogramField.ts
+++ b/src/client/northstar/dash-fields/HistogramField.ts
@@ -27,7 +27,7 @@ export class HistogramField extends BasicField<HistogramOperation> {
     }
 
     Copy(): Field {
-        return new HistogramField(this.Data);
+        return new HistogramField(this.Data.Copy());
     }
 
     ToScriptString(): string {
diff --git a/src/client/northstar/operations/HistogramOperation.ts b/src/client/northstar/operations/HistogramOperation.ts
index 7f48d1629..a3ddc1c98 100644
--- a/src/client/northstar/operations/HistogramOperation.ts
+++ b/src/client/northstar/operations/HistogramOperation.ts
@@ -42,6 +42,10 @@ export class HistogramOperation extends BaseOperation implements IBaseFilterCons
         this.SchemaName = schemaName;
     }
 
+    Copy(): HistogramOperation {
+        return new HistogramOperation(this.SchemaName, this.X, this.Y, this.V, this.Normalization);
+    }
+
     Equals(other: Object): boolean {
         throw new Error("Method not implemented.");
     }