diff --git a/swad_changelog.h b/swad_changelog.h
index d4dc789bd..30d5d19d7 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -170,24 +170,25 @@
 /****************************** Public constants *****************************/
 /*****************************************************************************/
 
-#define Log_PLATFORM_VERSION	"SWAD 16.64.12 (2016-11-18)"
+#define Log_PLATFORM_VERSION	"SWAD 16.64.13 (2016-11-19)"
 #define CSS_FILE		"swad16.60.1.css"
 #define JS_FILE			"swad16.46.1.js"
 
 // Number of lines (includes comments but not blank lines) has been got with the following command:
 // nl swad*.c swad*.h css/swad*.css py/swad*.py js/swad*.js soap/swad*?.h sql/swad*.sql | tail -1
 /*
-        Version 16.64.12: Nov 18, 2016	Input fields required in edition of course. (207298 lines)
-        Version 16.64.11: Nov 18, 2016	Input fields required in edition of degree. (207295 lines)
-        Version 16.64.10: Nov 18, 2016	Input fields required in edition of centre. (207290 lines)
-        Version 16.64.9:  Nov 18, 2016	Input fields required in edition of institution. (207286 lines)
-        Version 16.64.8:  Nov 18, 2016	Input fields required in edition of country. (207282 lines)
-        Version 16.64.7:  Nov 18, 2016	Input fields required in new account form.
+        Version 16.64.13: Nov 19, 2016	Input fields required in edition of groups. (207302 lines)
+        Version 16.64.12: Nov 19, 2016	Input fields required in edition of course. (207298 lines)
+        Version 16.64.11: Nov 19, 2016	Input fields required in edition of degree. (207295 lines)
+        Version 16.64.10: Nov 19, 2016	Input fields required in edition of centre. (207290 lines)
+        Version 16.64.9:  Nov 19, 2016	Input fields required in edition of institution. (207286 lines)
+        Version 16.64.8:  Nov 19, 2016	Input fields required in edition of country. (207282 lines)
+        Version 16.64.7:  Nov 19, 2016	Input fields required in new account form.
 					Input fields required in password forms. (207278 lines)
-        Version 16.64.6:  Nov 17, 2016	Input fields required in log in form. (207270 lines)
-        Version 16.64.5:  Nov 17, 2016	Input fields required in record card form. (207268 lines)
-        Version 16.64.4:  Nov 17, 2016	Contextual help on guests and administrators. (207264 lines)
-        Version 16.64.3:  Nov 17, 2016	Contextual help on teachers. (207259 lines)
+        Version 16.64.6:  Nov 18, 2016	Input fields required in log in form. (207270 lines)
+        Version 16.64.5:  Nov 18, 2016	Input fields required in record card form. (207268 lines)
+        Version 16.64.4:  Nov 18, 2016	Contextual help on guests and administrators. (207264 lines)
+        Version 16.64.3:  Nov 18, 2016	Contextual help on teachers. (207259 lines)
         Version 16.64.2:  Nov 17, 2016	Code refactoring in record cards. (207253 lines)
         Version 16.64.1:  Nov 17, 2016	Changes in texts related to record cards. (207252 lines)
         Version 16.64:    Nov 17, 2016	Contextual help on students.
diff --git a/swad_group.c b/swad_group.c
index 26f4293c9..91a71422e 100644
--- a/swad_group.c
+++ b/swad_group.c
@@ -2099,7 +2099,8 @@ static void Grp_PutFormToCreateGroupType (void)
    /***** Name of group type *****/
    fprintf (Gbl.F.Out,"<td class=\"LEFT_MIDDLE\">"
                       "<input type=\"text\" name=\"GrpTypName\""
-                      " size=\"12\" maxlength=\"%u\" value=\"%s\" />"
+                      " size=\"12\" maxlength=\"%u\" value=\"%s\""
+	              " required=\"required\" />"
                       "</td>",
             MAX_LENGTH_GROUP_TYPE_NAME,Gbl.CurrentCrs.Grps.GrpTyp.GrpTypName);
 
@@ -2240,7 +2241,9 @@ static void Grp_PutFormToCreateGroup (void)
    /***** Group name *****/
    fprintf (Gbl.F.Out,"<td class=\"CENTER_MIDDLE\">"
                       "<input type=\"text\" name=\"GrpName\""
-                      " size=\"40\" maxlength=\"%u\" value=\"%s\" /></td>",
+                      " size=\"40\" maxlength=\"%u\" value=\"%s\""
+	              " required=\"required\" />"
+	              "</td>",
             MAX_LENGTH_GROUP_NAME,Gbl.CurrentCrs.Grps.GrpName);
 
    /***** Maximum number of students *****/