diff --git a/wagtail/core/models.py b/wagtail/core/models.py
index 4c5731e577..04b76d1bd0 100644
--- a/wagtail/core/models.py
+++ b/wagtail/core/models.py
@@ -1754,12 +1754,12 @@ class Page(MultiTableCopyMixin, AbstractPage, index.Indexed, ClusterableModel, m
             return workflow
 
     def workflow_in_progress(self):
-        return WorkflowState.objects.filter(page=self, status=self.STATUS_IN_PROGRESS).exists()
+        return WorkflowState.objects.filter(page=self, status=WorkflowState.STATUS_IN_PROGRESS).exists()
 
     @property
     def current_workflow_state(self):
         try:
-            return WorkflowState.objects.get(page=self, status=self.STATUS_IN_PROGRESS)
+            return WorkflowState.objects.get(page=self, status=WorkflowState.STATUS_IN_PROGRESS)
         except WorkflowState.DoesNotExist:
             return