diff --git a/lib/issue_patch.rb b/lib/issue_patch.rb
index 7aea617..68e2a0d 100644
--- a/lib/issue_patch.rb
+++ b/lib/issue_patch.rb
@@ -24,7 +24,7 @@ module IssuePatch
       unloadable # Send unloadable so it will not be unloaded in development
       belongs_to :customer, primary_key: :id
       belongs_to :qbo_estimate, primary_key: :id
-      has_many :qbo_invoice, primary_key: :id
+      belongs_to :qbo_invoice, primary_key: :id
       belongs_to :vehicle, primary_key: :id
     end