diff --git a/course/index.php b/course/index.php
index ffcf9bbc5c7..74a7ec9c75b 100644
--- a/course/index.php
+++ b/course/index.php
@@ -346,23 +346,23 @@ function print_category_edit($category, $displaylist, $parentslist, $depth=-1, $
         echo "<td nowrap=\"nowrap\">";    /// Print little icons
 
         echo "<a title=\"$str->delete\" href=\"index.php?delete=$category->id&amp;sesskey=$USER->sesskey\"><img".
-             " src=\"$CFG->pixpath/t/delete.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"\" /></a> ";
+             " src=\"$CFG->pixpath/t/delete.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"$str->delete\" /></a> ";
 
         if (!empty($category->visible)) {
             echo "<a title=\"$str->hide\" href=\"index.php?hide=$category->id&amp;sesskey=$USER->sesskey\"><img".
-                 " src=\"$CFG->pixpath/t/hide.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"\" /></a> ";
+                 " src=\"$CFG->pixpath/t/hide.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"$str->hide\" /></a> ";
         } else {
             echo "<a title=\"$str->show\" href=\"index.php?show=$category->id&amp;sesskey=$USER->sesskey\"><img".
-                 " src=\"$CFG->pixpath/t/show.gif\" height=\"11\" width=\"11\" border=\"0\"alt=\"\" /></a> ";
+                 " src=\"$CFG->pixpath/t/show.gif\" height=\"11\" width=\"11\" border=\"0\"alt=\"$str->show\" /></a> ";
         }
 
         if ($up) {
             echo "<a title=\"$str->moveup\" href=\"index.php?moveup=$category->id&amp;sesskey=$USER->sesskey\"><img".
-                 " src=\"$CFG->pixpath/t/up.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"\" /></a> ";
+                 " src=\"$CFG->pixpath/t/up.gif\" height=\"11\" width=\"11\" border=\"0\" alt=\"$str->moveup\" /></a> ";
         }
         if ($down) {
             echo "<a title=\"$str->movedown\" href=\"index.php?movedown=$category->id&amp;sesskey=$USER->sesskey\"><img".
-                 " src=\"$CFG->pixpath/t/down.gif\" height=\"11\" width=\"11\" border=\"0\"alt=\"\" /></a> ";
+                 " src=\"$CFG->pixpath/t/down.gif\" height=\"11\" width=\"11\" border=\"0\"alt=\"$str->movedown\" /></a> ";
         }
         echo "</td>";