diff --git a/css/reveal.css b/css/reveal.css
index cb5e98b9..f8505c4e 100644
--- a/css/reveal.css
+++ b/css/reveal.css
@@ -85,7 +85,8 @@ body {
     visibility: visible; }
 
 .reveal .slides section .fragment.strike {
-  opacity: 1; }
+  opacity: 1;
+  visibility: visible; }
   .reveal .slides section .fragment.strike.visible {
     text-decoration: line-through; }
 
diff --git a/css/reveal.scss b/css/reveal.scss
index e1697b11..32187fdf 100644
--- a/css/reveal.scss
+++ b/css/reveal.scss
@@ -121,6 +121,7 @@ body {
 
 .reveal .slides section .fragment.strike {
 	opacity: 1;
+	visibility: visible;
 
 	&.visible {
 		text-decoration: line-through;