diff --git a/theme/standard/styles_layout.css b/theme/standard/styles_layout.css
index f50acb80c31..b74805aac5c 100644
--- a/theme/standard/styles_layout.css
+++ b/theme/standard/styles_layout.css
@@ -1355,6 +1355,10 @@ a.skip:focus, a.skip:active {
   margin-right: auto;
 }
 
+.block_adminblock {
+  width: 180px;
+}
+
 .block_messages .content {
   text-align:left;
   font-size:0.75em;