diff --git a/main/course_home/activity.php b/main/course_home/activity.php
old mode 100755
new mode 100644
index c34cf58677..b274d27711
--- a/main/course_home/activity.php
+++ b/main/course_home/activity.php
@@ -120,7 +120,7 @@ if (api_is_allowed_to_edit(null, true) && !api_is_coach()) {
         if ($theme  == 'activity_big') {
             $rows = 4;
         }
-        $my_list = CourseHome::get_tools_category(TOOL_ADMIN_PLATEFORM);
+        $my_list = CourseHome::get_tools_category(TOOL_ADMIN_PLATFORM);
         CourseHome::show_tools_category($my_list, $rows);
 ?>	
 	</div>
diff --git a/main/course_home/course_home.php b/main/course_home/course_home.php
index d1e31cfe9a..13c16a27f1 100644
--- a/main/course_home/course_home.php
+++ b/main/course_home/course_home.php
@@ -134,7 +134,7 @@ define('TOOL_AUTHORING', 			'toolauthoring');
 define('TOOL_INTERACTION',			'toolinteraction');
 define('TOOL_COURSE_PLUGIN',		'toolcourseplugin'); //all plugins that can be enabled in courses
 define('TOOL_ADMIN', 				'tooladmin');
-define('TOOL_ADMIN_PLATEFORM', 		'tooladminplatform');
+define('TOOL_ADMIN_PLATFORM', 		'tooladminplatform');
 
 //define('TOOL_ADMIN_PLATFORM_VISIBLE', 'tooladminplatformvisible');
 //define('TOOL_ADMIN_PLATFORM_INVISIBLE', 'tooladminplatforminvisible');
diff --git a/main/course_home/vertical_activity.php b/main/course_home/vertical_activity.php
old mode 100755
new mode 100644
index 5f0eb66c56..b6e1f9ad4c
--- a/main/course_home/vertical_activity.php
+++ b/main/course_home/vertical_activity.php
@@ -132,7 +132,7 @@ if (api_is_allowed_to_edit(null, true) && !api_is_coach()) {
 	<div class="courseadminview-activity-3col">
 		<span class="viewcaption"><?php echo get_lang('Administration'); ?></span>	
 <?php
-			$my_list = CourseHome::get_tools_category(TOOL_ADMIN_PLATEFORM);
+			$my_list = CourseHome::get_tools_category(TOOL_ADMIN_PLATFORM);
 			CourseHome::show_tools_category($my_list);
 ?>
 	</div>
diff --git a/main/inc/lib/course_home.lib.php b/main/inc/lib/course_home.lib.php
index 6e382a724b..7cd03a3db3 100644
--- a/main/inc/lib/course_home.lib.php
+++ b/main/inc/lib/course_home.lib.php
@@ -461,7 +461,7 @@ class CourseHome {
                     $result = Database::query($sql);
                     $col_link ="##003399";
                     break;
-            case TOOL_ADMIN_PLATEFORM:
+            case TOOL_ADMIN_PLATFORM:
                     $sql = "SELECT * FROM $course_tool_table WHERE category = 'admin' $condition_session ORDER BY id";
                     $result = Database::query($sql);
                     $col_link ="##003399";