diff --git a/app/models/slideshow_block.rb b/app/models/slideshow_block.rb
index 4c19519..2968cc3 100644
--- a/app/models/slideshow_block.rb
+++ b/app/models/slideshow_block.rb
@@ -30,7 +30,7 @@ class SlideshowBlock < Block
       end
     else
       lambda do
-        content_tag('em', _('Please, select one gallery to display the images.'))
+        content_tag('em', _('Please select a gallery to display its images.'))
       end
     end
   end
--
libgit2 0.21.2