diff --git a/app/models/user.rb b/app/models/user.rb
index c3f9b1ef..d93d4fb9 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -107,7 +107,7 @@ class User < ApplicationRecord
   # @param content [String] the answer content
   def answer(question, content)
     # rubocop:disable Style/RedundantSelf
-    raise Errors::AnsweringOtherBlockedSelf if question.user.blocking?(self)
+    raise Errors::AnsweringOtherBlockedSelf if question.user&.blocking?(self)
     raise Errors::AnsweringSelfBlockedOther if self.blocking?(question.user)
     # rubocop:enable Style/RedundantSelf