diff --git a/app/models/repository.rb b/app/models/repository.rb
index ff06f08..2ff3d4f 100644
--- a/app/models/repository.rb
+++ b/app/models/repository.rb
@@ -38,7 +38,7 @@ class Repository < ActiveRecord::Base
 
   validates_length_of :password, :maximum => 255, :allow_nil => true
   validates_length_of :identifier, :maximum => IDENTIFIER_MAX_LENGTH, :allow_blank => true
-  validates_presence_of :identifier, :unless => Proc.new { |r| r.is_default? || r.set_as_default? }
+#  validates_presence_of :identifier, :unless => Proc.new { |r| r.is_default? || r.set_as_default? }
   validates_uniqueness_of :identifier, :scope => :project_id, :allow_blank => true
   validates_exclusion_of :identifier, :in => %w(browse show entry raw changes annotate diff statistics graph revisions revision)
   # donwcase letters, digits, dashes, underscores but not digits only
diff --git a/test/unit/repository_git_test.rb b/test/unit/repository_git_test.rb
index abd123a..a7388d0 100644
--- a/test/unit/repository_git_test.rb
+++ b/test/unit/repository_git_test.rb
@@ -53,6 +53,35 @@ class RepositoryGitTest < ActiveSupport::TestCase
     end
   end
 
+  def test_nondefault_repo_with_blank_identifier_destruction
+    repo1 = Repository::Git.new(
+                          :project    => @project,
+                          :url        => REPOSITORY_PATH,
+                          :identifier => '',
+                          :is_default => true
+                        )
+    assert repo1.save
+    repo1.fetch_changesets
+
+    repo2 = Repository::Git.new(
+                          :project    => @project,
+                          :url        => REPOSITORY_PATH,
+                          :identifier => 'repo2',
+                          :is_default => true
+                    )
+    assert repo2.save
+    repo2.fetch_changesets
+
+    repo1.reload
+    repo2.reload
+    assert !repo1.is_default?
+    assert  repo2.is_default?
+
+    assert_difference 'Repository.count', -1 do
+      repo1.destroy
+    end
+  end
+
   def test_blank_path_to_repository_error_message
     set_language_if_valid 'en'
     repo = Repository::Git.new(