diff --git a/includes/galleria.admin.inc b/includes/galleria.admin.inc
index dd5adc7..c62d24f 100644
--- a/includes/galleria.admin.inc
+++ b/includes/galleria.admin.inc
@@ -134,6 +134,7 @@ function galleria_option_elements() {
     'portrait'  => t('Fill up images with portrait proportions; scale landscape images to fit.'),
   );
   $transitionOptions = array(
+    'none'      => t('none: No transition (supports IE10)'),
     'fade'      => t('fade: crossfade betweens images'),
     'flash'     => t('flash: fades into background color between images'),
     'pulse'     => t('pulse: quickly removes the image into background color, then fades the next image'),