diff --git a/app/controllers/timelog_controller.rb b/app/controllers/timelog_controller.rb
index 160c199..73ff58b 100644
--- a/app/controllers/timelog_controller.rb
+++ b/app/controllers/timelog_controller.rb
@@ -225,8 +225,11 @@ class TimelogController < ApplicationController
   def destroy
     (render_404; return) unless @time_entry
     (render_403; return) unless @time_entry.editable_by?(User.current)
-    @time_entry.destroy
-    flash[:notice] = l(:notice_successful_delete)
+    if @time_entry.destroy && @time_entry.destroyed?
+      flash[:notice] = l(:notice_successful_delete)
+    else
+      flash[:error] = l(:notice_unable_delete_time_entry)
+    end
     redirect_to :back
   rescue ::ActionController::RedirectBackError
     redirect_to :action => 'details', :project_id => @time_entry.project
diff --git a/config/locales/de.yml b/config/locales/de.yml
index 1337edd..314f401 100644
--- a/config/locales/de.yml
+++ b/config/locales/de.yml
@@ -175,6 +175,7 @@ de:
   notice_account_pending: "Ihr Konto wurde erstellt und wartet jetzt auf die Genehmigung des Administrators."
   notice_default_data_loaded: Die Standard-Konfiguration wurde erfolgreich geladen.
   notice_unable_delete_version: Die Version konnte nicht gelöscht werden.
+  notice_unable_delete_time_entry: Der Zeiterfassungseintrag konnte nicht gelöscht werden.
   notice_issue_done_ratios_updated: Der Ticket-Fortschritt wurde aktualisiert.
 
   error_can_t_load_default_data: "Die Standard-Konfiguration konnte nicht geladen werden: {{value}}"
diff --git a/config/locales/en.yml b/config/locales/en.yml
index c3fc52e..8c2c69e 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -153,6 +153,7 @@ en:
   notice_account_pending: "Your account was created and is now pending administrator approval."
   notice_default_data_loaded: Default configuration successfully loaded.
   notice_unable_delete_version: Unable to delete version.
+  notice_unable_delete_time_entry: Unable to delete time log entry.
   notice_issue_done_ratios_updated: Issue done ratios updated.
   
   error_can_t_load_default_data: "Default configuration could not be loaded: {{value}}"
diff --git a/test/functional/timelog_controller_test.rb b/test/functional/timelog_controller_test.rb
index 8805273..9e30a0a 100644
--- a/test/functional/timelog_controller_test.rb
+++ b/test/functional/timelog_controller_test.rb
@@ -116,9 +116,27 @@ class TimelogControllerTest < ActionController::TestCase
     @request.session[:user_id] = 2
     post :destroy, :id => 1
     assert_redirected_to :action => 'details', :project_id => 'ecookbook'
+    assert_equal I18n.t(:notice_successful_delete), flash[:notice]
     assert_nil TimeEntry.find_by_id(1)
   end
   
+  def test_destroy_should_fail
+    # simulate that this fails (e.g. due to a plugin), see #5700
+    TimeEntry.class_eval do
+      before_destroy :stop_callback_chain
+      def stop_callback_chain ; return false ; end
+    end
+
+    @request.session[:user_id] = 2
+    post :destroy, :id => 1
+    assert_redirected_to :action => 'details', :project_id => 'ecookbook'
+    assert_equal I18n.t(:notice_unable_delete_time_entry), flash[:error]
+    assert_not_nil TimeEntry.find_by_id(1)
+
+    # remove the simulation
+    TimeEntry.before_destroy.reject! {|callback| callback.method == :stop_callback_chain }
+  end
+  
   def test_report_no_criteria
     get :report, :project_id => 1
     assert_response :success