diff --git a/themes/commons_origins/css/commons_origins-style.css b/themes/commons_origins/css/commons_origins-style.css
index 5a83e6b..6ccddfe 100644
--- a/themes/commons_origins/css/commons_origins-style.css
+++ b/themes/commons_origins/css/commons_origins-style.css
@@ -149,6 +149,10 @@ overflow: inherit;
 	color: #6E6E6E;
 }
 
+#commons-core-join-form {
+  width: 270px;
+}
+
 /* Typography for site slogan */
 
 #slogan {