diff --git a/lib/filelib.php b/lib/filelib.php
index 0f3f252f6e3..0330a4b6aea 100644
--- a/lib/filelib.php
+++ b/lib/filelib.php
@@ -2369,7 +2369,7 @@ function send_stored_file($stored_file, $lifetime=null, $filter=0, $forcedownloa
                 $size = 256;
             }
             $fileicon = file_file_icon($stored_file, $size);
-            send_file($CFG->dirroot.'/pix/'.$fileicon.'.svg', basename($fileicon).'.svg');
+            send_file($CFG->dirroot.'/pix/'.$fileicon.'.png', basename($fileicon).'.png');
         } else {
             // preview images have fixed cache lifetime and they ignore forced download
             // (they are generated by GD and therefore they are considered reasonably safe).