diff --git a/course/lib.php b/course/lib.php
index e3a8c492dbf..3694cf5f49c 100644
--- a/course/lib.php
+++ b/course/lib.php
@@ -600,7 +600,7 @@ function print_course_categories($categories, $selected="none", $width=180) {
     if ($selected == "index") {  // Print comprehensive index of categories with courses
         if ($courses = get_records_sql("SELECT * FROM course WHERE category > 0 ORDER BY shortname")) {
             if (isset($USER->id) and !isadmin()) {
-                print_simple_box_start("LEFT", "100%");
+                print_simple_box_start("CENTER", "100%");
                 print_heading("<A HREF=\"course/index.php?category=my\">".get_string("mycourses")."</A>", "LEFT");
                 $some = false;
                 echo "<UL>";
@@ -618,7 +618,7 @@ function print_course_categories($categories, $selected="none", $width=180) {
                 print_spacer(8,1);
             }
             foreach ($categories as $category) {
-                print_simple_box_start("LEFT", "100%");
+                print_simple_box_start("CENTER", "100%");
                 print_heading("<A HREF=\"course/index.php?category=$category->id\">$category->name</A>", "LEFT");
                 $some = false;
                 echo "<UL>";