diff --git a/awx/api/serializers.py b/awx/api/serializers.py
index 01ab3c6fac..2f98fc6053 100644
--- a/awx/api/serializers.py
+++ b/awx/api/serializers.py
@@ -609,7 +609,7 @@ class UnifiedJobSerializer(BaseSerializer):
             summary_fields['source_workflow_job'] = {}
             try:
                 summary_obj = obj.unified_job_node.workflow_job
-            except ObjectDoesNotExist:
+            except UnifiedJob.unified_job_node.RelatedObjectDoesNotExist:
                 return summary_fields
 
             for field in SUMMARIZABLE_FK_FIELDS['job']:
diff --git a/awx/main/models/unified_jobs.py b/awx/main/models/unified_jobs.py
index 712bb73530..31afe69d32 100644
--- a/awx/main/models/unified_jobs.py
+++ b/awx/main/models/unified_jobs.py
@@ -20,7 +20,6 @@ from django.utils.translation import ugettext_lazy as _
 from django.utils.timezone import now
 from django.utils.encoding import smart_text
 from django.apps import apps
-from django.core.exceptions import ObjectDoesNotExist
 
 # Django-Polymorphic
 from polymorphic import PolymorphicModel
@@ -783,7 +782,7 @@ class UnifiedJob(PolymorphicModel, PasswordFieldsModel, CommonModelNameNotUnique
         if self.spawned_by_workflow:
             try:
                 return self.unified_job_node.workflow_job.pk
-            except ObjectDoesNotExist:
+            except UnifiedJob.unified_job_node.RelatedObjectDoesNotExist:
                 pass
         return None
 
@@ -792,7 +791,7 @@ class UnifiedJob(PolymorphicModel, PasswordFieldsModel, CommonModelNameNotUnique
         if self.spawned_by_workflow:
             try:
                 return self.unified_job_node.pk
-            except ObjectDoesNotExist:
+            except UnifiedJob.unified_job_node.RelatedObjectDoesNotExist:
                 pass
         return None