diff --git a/theme/standard/styles_layout.css b/theme/standard/styles_layout.css
index 665824f5c2a..ad9ae43d4d8 100644
--- a/theme/standard/styles_layout.css
+++ b/theme/standard/styles_layout.css
@@ -1590,6 +1590,13 @@ body#course-index .singlebutton {
 }
 
 
+/***
+ *** Group
+ ***/
+body#group-index #groupeditform {
+    text-align: center;
+}
+
 
 /***
  *** Doc