diff --git a/lms/djangoapps/courseware/access.py b/lms/djangoapps/courseware/access.py
index 3fa2cda60c..3d41f5525d 100644
--- a/lms/djangoapps/courseware/access.py
+++ b/lms/djangoapps/courseware/access.py
@@ -663,17 +663,19 @@ def _has_staff_access_to_descriptor(user, descriptor, course_key):
     return _has_staff_access_to_location(user, descriptor.location, course_key)
 
 
-def is_mobile_available_for_user(user, course):
+def is_mobile_available_for_user(user, descriptor):
     """
     Returns whether the given course is mobile_available for the given user.
     Checks:
         mobile_available flag on the course
         Beta User and staff access overrides the mobile_available flag
+    Arguments:
+        descriptor (CourseDescriptor|CourseOverview): course or overview of course in question
     """
     return (
-        course.mobile_available or
-        auth.has_access(user, CourseBetaTesterRole(course.id)) or
-        _has_staff_access_to_descriptor(user, course, course.id)
+        descriptor.mobile_available or
+        auth.has_access(user, CourseBetaTesterRole(descriptor.id)) or
+        _has_staff_access_to_descriptor(user, descriptor, descriptor.id)
     )
 
 
diff --git a/lms/djangoapps/mobile_api/users/serializers.py b/lms/djangoapps/mobile_api/users/serializers.py
index 1674313343..b4876b3ae4 100644
--- a/lms/djangoapps/mobile_api/users/serializers.py
+++ b/lms/djangoapps/mobile_api/users/serializers.py
@@ -9,11 +9,11 @@ from student.models import CourseEnrollment, User
 from certificates.models import certificate_status_for_student, CertificateStatuses
 
 
-class CourseField(serializers.RelatedField):
+class CourseOverviewField(serializers.RelatedField):
     """Custom field to wrap a CourseDescriptor object. Read-only."""
 
-    def to_native(self, course):
-        course_id = unicode(course.id)
+    def to_native(self, course_overview):
+        course_id = unicode(course_overview.id)
         request = self.context.get('request', None)
         if request:
             video_outline_url = reverse(
@@ -38,14 +38,14 @@ class CourseField(serializers.RelatedField):
 
         return {
             "id": course_id,
-            "name": course.display_name,
-            "number": course.display_number_with_default,
-            "org": course.display_org_with_default,
-            "start": course.start,
-            "end": course.end,
-            "course_image": course_image_url(course),
+            "name": course_overview.display_name,
+            "number": course_overview.display_number_with_default,
+            "org": course_overview.display_org_with_default,
+            "start": course_overview.start,
+            "end": course_overview.end,
+            "course_image": course_overview.course_image_url,
             "social_urls": {
-                "facebook": course.facebook_url,
+                "facebook": course_overview.facebook_url,
             },
             "latest_updates": {
                 "video": None
@@ -53,7 +53,7 @@ class CourseField(serializers.RelatedField):
             "video_outline": video_outline_url,
             "course_updates": course_updates_url,
             "course_handouts": course_handouts_url,
-            "subscription_id": course.clean_id(padding_char='_'),
+            "subscription_id": course_overview.clean_id(padding_char='_'),
         }
 
 
@@ -61,7 +61,7 @@ class CourseEnrollmentSerializer(serializers.ModelSerializer):
     """
     Serializes CourseEnrollment models
     """
-    course = CourseField()
+    course = CourseOverviewField(source="course_overview")
     certificate = serializers.SerializerMethodField('get_certificate')
 
     def get_certificate(self, model):
diff --git a/lms/djangoapps/mobile_api/users/views.py b/lms/djangoapps/mobile_api/users/views.py
index 72e66cb0e5..19dae819c9 100644
--- a/lms/djangoapps/mobile_api/users/views.py
+++ b/lms/djangoapps/mobile_api/users/views.py
@@ -241,7 +241,8 @@ class UserCourseEnrollmentsList(generics.ListAPIView):
         ).order_by('created').reverse()
         return [
             enrollment for enrollment in enrollments
-            if enrollment.course and is_mobile_available_for_user(self.request.user, enrollment.course)
+            if enrollment.course_overview and
+            is_mobile_available_for_user(self.request.user, enrollment.course_overview)
         ]