diff --git a/addons/website_slides/static/src/scss/slides_slide_fullscreen.scss b/addons/website_slides/static/src/scss/slides_slide_fullscreen.scss
index 36a173dc255..ce306a53b21 100644
--- a/addons/website_slides/static/src/scss/slides_slide_fullscreen.scss
+++ b/addons/website_slides/static/src/scss/slides_slide_fullscreen.scss
@@ -1,7 +1,7 @@
 
 .o_wslides_fs_main {
     @include o-position-absolute(0,0,0,0);
-    z-index: 2000;
+    z-index: $zindex-dropdown - 1;
     background-image: linear-gradient(120deg, $o-wslides-color-dark2, $o-wslides-color-dark3);
 
     .o_wslides_slide_fs_header {