diff --git a/app/validators/import_validator.rb b/app/validators/import_validator.rb
index 9f19aee2aec..cbad56df63b 100644
--- a/app/validators/import_validator.rb
+++ b/app/validators/import_validator.rb
@@ -26,6 +26,8 @@ class ImportValidator < ActiveModel::Validator
     when 'following'
       validate_following_import(import, row_count)
     end
+  rescue CSV::MalformedCSVError
+    import.errors.add(:data, :malformed)
   end
 
   private
diff --git a/config/locales/activerecord.en.yml b/config/locales/activerecord.en.yml
index 2dfa3b955ef..8aee15659f2 100644
--- a/config/locales/activerecord.en.yml
+++ b/config/locales/activerecord.en.yml
@@ -29,6 +29,10 @@ en:
           attributes:
             website:
               invalid: is not a valid URL
+        import:
+          attributes:
+            data:
+              malformed: is malformed
         status:
           attributes:
             reblog: