Index: index.php
===================================================================
--- index.php	
+++ index.php	
@@ -331,6 +331,11 @@
             echo '<a title="'.$str->edit.'" href="editcategory.php?id='.$category->id.'"><img'.
                  ' src="'.$CFG->pixpath.'/t/edit.gif" class="iconsmall" alt="'.$str->edit.'" /></a> ';
 
+            if (has_capability('moodle/role:assign', $category->context)) {
+                echo '<a title="'.get_string('assignroles', 'role').'" href="'.$CFG->wwwroot.'/'.$CFG->admin.'/roles/assign.php?contextid='.$category->context->id.'">'.
+                        '<img src="'.$CFG->pixpath.'/i/roles.gif" class="iconsmall" alt="'.get_string('assignroles', 'role').'" /></a> ';
+            }
+                
             echo '<a title="'.$str->delete.'" href="index.php?delete='.$category->id.'&amp;sesskey='.sesskey().'"><img'.
                  ' src="'.$CFG->pixpath.'/t/delete.gif" class="iconsmall" alt="'.$str->delete.'" /></a> ';