diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9e912cc46..ade2b31e0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@
 - Fix a bug: event, space, training or machine main image on description page is deformed on small devices
 - Fix a bug: profile completion of non SSO-imported users trigger a fuzzy email
 - Fix a bug: creation of negative credits
+- Fix a bug: unable to display profiles of users whom any reservation is associated with a deleted object
 - Updated test data to allow passing test suite
 - [TODO DEPLOY] `rake db:migrate`
 
diff --git a/app/views/api/members/show.json.jbuilder b/app/views/api/members/show.json.jbuilder
index 7f417dffe..9074edbe3 100644
--- a/app/views/api/members/show.json.jbuilder
+++ b/app/views/api/members/show.json.jbuilder
@@ -61,7 +61,7 @@ json.training_reservations @member.reservations.where(reservable_type: 'Training
   json.start_at r.slots.first.start_at
   json.end_at r.slots.first.end_at
   json.reservable r.reservable
-  json.is_valid @member.training_ids.include?(r.reservable.id)
+  json.is_valid @member.training_ids.include?(r.reservable_id)
   json.canceled_at r.slots.first.canceled_at
 end
 json.training_credits @member.training_credits do |tc|