diff --git a/app/models/project.rb b/app/models/project.rb
index 8d71e01103c2bfb93af82d1ca78484afaf8da840..d3ae4a2dd0bda924bfaee5ba6fba1d1f1b8ede25 100644
--- a/app/models/project.rb
+++ b/app/models/project.rb
@@ -162,7 +162,7 @@ class Project < ActiveRecord::Base
   validates :namespace, presence: true
   validates_uniqueness_of :name, scope: :namespace_id
   validates_uniqueness_of :path, scope: :namespace_id
-  validates :import_url, addressable_url: true, if: "import_url.present?"
+  validates :import_url, addressable_url: true, if: :external_import?
   validates :star_count, numericality: { greater_than_or_equal_to: 0 }
   validate :check_limit, on: :create
   validate :avatar_type,