diff --git a/docs/examples/widgets/placeholder.css b/docs/examples/widgets/placeholder.css
index 0fe651cd5..3469bb911 100644
--- a/docs/examples/widgets/placeholder.css
+++ b/docs/examples/widgets/placeholder.css
@@ -23,6 +23,7 @@ Placeholder {
 #c1 {
     row-span: 4;
     column-span: 8;
+    height: 100%;
 }
 
 #col1, #col2, #col3 {