diff --git a/css/area_main-sidebar-search.less b/css/area_main-sidebar-search.less
index 77a7552..45567e5 100644
--- a/css/area_main-sidebar-search.less
+++ b/css/area_main-sidebar-search.less
@@ -194,7 +194,7 @@
                 z-index: 1;
                 display: block;
                 float: left;
-                width: 100%;
+                width: auto;
             }
 
             form {