diff --git a/logging/google/cloud/logging/_gapic.py b/logging/google/cloud/logging/_gapic.py
index af2a498eeb62..2ff0d30cf3af 100644
--- a/logging/google/cloud/logging/_gapic.py
+++ b/logging/google/cloud/logging/_gapic.py
@@ -94,7 +94,7 @@ def list_entries(self, projects, filter_='', order_by='',
         # objects are created by entry_from_resource, they can be
         # re-used by other log entries from the same logger.
         loggers = {}
-        page_iter._item_to_value = functools.partial(
+        page_iter.item_to_value = functools.partial(
             _item_to_entry, loggers=loggers)
         return page_iter
 
@@ -175,7 +175,7 @@ def list_sinks(self, project, page_size=0, page_token=None):
             path, page_size=page_size)
         page_iter.client = self._client
         page_iter.next_page_token = page_token
-        page_iter._item_to_value = _item_to_sink
+        page_iter.item_to_value = _item_to_sink
         return page_iter
 
     def sink_create(self, project, sink_name, filter_, destination,
@@ -327,7 +327,7 @@ def list_metrics(self, project, page_size=0, page_token=None):
             path, page_size=page_size)
         page_iter.client = self._client
         page_iter.next_page_token = page_token
-        page_iter._item_to_value = _item_to_metric
+        page_iter.item_to_value = _item_to_metric
         return page_iter
 
     def metric_create(self, project, metric_name, filter_, description):
diff --git a/trace/google/cloud/trace/v1/_gapic.py b/trace/google/cloud/trace/v1/_gapic.py
index d4b7179b4024..20c338063d59 100644
--- a/trace/google/cloud/trace/v1/_gapic.py
+++ b/trace/google/cloud/trace/v1/_gapic.py
@@ -120,7 +120,7 @@ def list_traces(
             end_time=end_time,
             filter_=filter_,
             order_by=order_by)
-        page_iter._item_to_value = _item_to_mapping
+        page_iter.item_to_value = _item_to_mapping
         page_iter.next_page_token = page_token
         return page_iter