diff --git a/assets/css/theme.scss b/assets/css/theme.scss
index 8e1bb07c3..877b3b40b 100644
--- a/assets/css/theme.scss
+++ b/assets/css/theme.scss
@@ -610,6 +610,6 @@ span.navigation:before {
 }
 
 .hover-opacity:hover {
-    transition: all.3s;
+    transition: all .3s;
     opacity:.8;
 }