diff --git a/lib/redux/purchase_order/purchase_order_reducer.dart b/lib/redux/purchase_order/purchase_order_reducer.dart
index c7e298512..f15635795 100644
--- a/lib/redux/purchase_order/purchase_order_reducer.dart
+++ b/lib/redux/purchase_order/purchase_order_reducer.dart
@@ -14,15 +14,14 @@ import 'package:invoiceninja_flutter/redux/ui/list_ui_state.dart';
 EntityUIState purchaseOrderUIReducer(
     PurchaseOrderUIState state, dynamic action) {
   return state.rebuild((b) => b
-        ..listUIState
-            .replace(purchaseOrderListReducer(state.listUIState, action))
-        ..editing.replace(editingReducer(state.editing, action))
-        ..editingItemIndex = editingItemReducer(state.editingItemIndex, action)
-        ..selectedId = selectedIdReducer(state.selectedId, action)
-        ..forceSelected = forceSelectedReducer(state.forceSelected, action)
-        ..tabIndex = tabIndexReducer(state.tabIndex, action)
-      //..historyActivityId = historyActivityIdReducer(state.historyActivityId, action)
-      );
+    ..listUIState.replace(purchaseOrderListReducer(state.listUIState, action))
+    ..editing.replace(editingReducer(state.editing, action))
+    ..editingItemIndex = editingItemReducer(state.editingItemIndex, action)
+    ..selectedId = selectedIdReducer(state.selectedId, action)
+    ..forceSelected = forceSelectedReducer(state.forceSelected, action)
+    ..tabIndex = tabIndexReducer(state.tabIndex, action)
+    ..historyActivityId =
+        historyActivityIdReducer(state.historyActivityId, action));
 }
 
 final forceSelectedReducer = combineReducers<bool>([
diff --git a/lib/redux/purchase_order/purchase_order_state.dart b/lib/redux/purchase_order/purchase_order_state.dart
index 259ad0e46..493ef69bd 100644
--- a/lib/redux/purchase_order/purchase_order_state.dart
+++ b/lib/redux/purchase_order/purchase_order_state.dart
@@ -76,6 +76,10 @@ abstract class PurchaseOrderUIState extends Object
   @BuiltValueField(serialize: false)
   int get editingItemIndex;
 
+  @nullable
+  @BuiltValueField(serialize: false)
+  String get historyActivityId;
+
   @override
   bool get isCreatingNew => editing.isNew;
 
diff --git a/lib/redux/purchase_order/purchase_order_state.g.dart b/lib/redux/purchase_order/purchase_order_state.g.dart
index 53b7e6caf..7a6eec661 100644
--- a/lib/redux/purchase_order/purchase_order_state.g.dart
+++ b/lib/redux/purchase_order/purchase_order_state.g.dart
@@ -266,6 +266,8 @@ class _$PurchaseOrderUIState extends PurchaseOrderUIState {
   @override
   final int editingItemIndex;
   @override
+  final String historyActivityId;
+  @override
   final ListUIState listUIState;
   @override
   final String selectedId;
@@ -285,6 +287,7 @@ class _$PurchaseOrderUIState extends PurchaseOrderUIState {
   _$PurchaseOrderUIState._(
       {this.editing,
       this.editingItemIndex,
+      this.historyActivityId,
       this.listUIState,
       this.selectedId,
       this.forceSelected,
@@ -313,6 +316,7 @@ class _$PurchaseOrderUIState extends PurchaseOrderUIState {
     return other is PurchaseOrderUIState &&
         editing == other.editing &&
         editingItemIndex == other.editingItemIndex &&
+        historyActivityId == other.historyActivityId &&
         listUIState == other.listUIState &&
         selectedId == other.selectedId &&
         forceSelected == other.forceSelected &&
@@ -330,8 +334,10 @@ class _$PurchaseOrderUIState extends PurchaseOrderUIState {
                 $jc(
                     $jc(
                         $jc(
-                            $jc($jc(0, editing.hashCode),
-                                editingItemIndex.hashCode),
+                            $jc(
+                                $jc($jc(0, editing.hashCode),
+                                    editingItemIndex.hashCode),
+                                historyActivityId.hashCode),
                             listUIState.hashCode),
                         selectedId.hashCode),
                     forceSelected.hashCode),
@@ -345,6 +351,7 @@ class _$PurchaseOrderUIState extends PurchaseOrderUIState {
     return (newBuiltValueToStringHelper('PurchaseOrderUIState')
           ..add('editing', editing)
           ..add('editingItemIndex', editingItemIndex)
+          ..add('historyActivityId', historyActivityId)
           ..add('listUIState', listUIState)
           ..add('selectedId', selectedId)
           ..add('forceSelected', forceSelected)
@@ -369,6 +376,11 @@ class PurchaseOrderUIStateBuilder
   set editingItemIndex(int editingItemIndex) =>
       _$this._editingItemIndex = editingItemIndex;
 
+  String _historyActivityId;
+  String get historyActivityId => _$this._historyActivityId;
+  set historyActivityId(String historyActivityId) =>
+      _$this._historyActivityId = historyActivityId;
+
   ListUIStateBuilder _listUIState;
   ListUIStateBuilder get listUIState =>
       _$this._listUIState ??= new ListUIStateBuilder();
@@ -405,6 +417,7 @@ class PurchaseOrderUIStateBuilder
     if ($v != null) {
       _editing = $v.editing?.toBuilder();
       _editingItemIndex = $v.editingItemIndex;
+      _historyActivityId = $v.historyActivityId;
       _listUIState = $v.listUIState.toBuilder();
       _selectedId = $v.selectedId;
       _forceSelected = $v.forceSelected;
@@ -435,6 +448,7 @@ class PurchaseOrderUIStateBuilder
           new _$PurchaseOrderUIState._(
               editing: _editing?.build(),
               editingItemIndex: editingItemIndex,
+              historyActivityId: historyActivityId,
               listUIState: listUIState.build(),
               selectedId: selectedId,
               forceSelected: forceSelected,
diff --git a/lib/ui/purchase_order/purchase_order_pdf_vm.dart b/lib/ui/purchase_order/purchase_order_pdf_vm.dart
index b13b0cbf9..d1c3e1b61 100644
--- a/lib/ui/purchase_order/purchase_order_pdf_vm.dart
+++ b/lib/ui/purchase_order/purchase_order_pdf_vm.dart
@@ -56,7 +56,7 @@ class PurchaseOrderPdfVM extends EntityPdfVM {
     return PurchaseOrderPdfVM(
       state: state,
       invoice: invoice,
-      //activityId: purchaseOrderUIState.historyActivityId,
+      activityId: purchaseOrderUIState.historyActivityId,
     );
   }
 }