diff --git a/data/gtk-styles.css b/data/gtk-styles.css
index 00f33be4..bf496d6d 100644
--- a/data/gtk-styles.css
+++ b/data/gtk-styles.css
@@ -47,7 +47,7 @@
 
 /* TODO: not working */
 .event-view .view {
-  box-shadow: 40 40 black;
+  box-shadow: 40px 40px black;
 }
 
 .event {