diff --git a/css/vex-theme-top.css b/css/vex-theme-top.css
index 0754f7d..e357f91 100644
--- a/css/vex-theme-top.css
+++ b/css/vex-theme-top.css
@@ -743,7 +743,7 @@
 }
 
 /* line 8, ../sass/vex-theme-top.sass */
-.vex.vex-theme-os.vex-closing .vex-content {
+.vex.vex-theme-top.vex-closing .vex-content {
   animation: vex-dropout 0.5s;
   -webkit-animation: vex-dropout 0.5s;
   -moz-animation: vex-dropout 0.5s;
@@ -752,7 +752,7 @@
   -webkit-backface-visibility: hidden;
 }
 /* line 11, ../sass/vex-theme-top.sass */
-.vex.vex-theme-os .vex-content {
+.vex.vex-theme-top .vex-content {
   animation: vex-dropin 0.5s;
   -webkit-animation: vex-dropin 0.5s;
   -moz-animation: vex-dropin 0.5s;
diff --git a/sass/vex-theme-top.sass b/sass/vex-theme-top.sass
index d0783fe..39482c0 100644
--- a/sass/vex-theme-top.sass
+++ b/sass/vex-theme-top.sass
@@ -3,7 +3,7 @@
 +keyframes-vex-dropin
 +keyframes-vex-dropout
 
-.vex.vex-theme-os
+.vex.vex-theme-top
 
     &.vex-closing .vex-content
         +vex-animation(vex-dropout .5s)