diff --git a/lib/util.php b/lib/util.php
index 30b767c3ef..f6d50b1807 100644
--- a/lib/util.php
+++ b/lib/util.php
@@ -497,6 +497,22 @@ function common_linkify($url) {
 
     $attrs = array('href' => $longurl, 'rel' => 'external');
 
+    $is_attachment = false;
+    $attachment_id = null;
+    $has_thumb = false;
+
+    // Check to see whether there's a filename associated with this URL.
+    // If there is, it's an upload and qualifies as an attachment
+
+    $localfile = File::staticGet('url', $longurl);
+
+    if (!empty($localfile)) {
+        if (isset($localfile->filename)) {
+            $is_attachment = true;
+            $attachment_id = $localfile->id;
+        }
+    }
+
 // if this URL is an attachment, then we set class='attachment' and id='attahcment-ID'
 // where ID is the id of the attachment for the given URL.
 //
@@ -504,24 +520,35 @@ function common_linkify($url) {
 // we're currently picking up oembeds only.
 // I think the best option is another file_view table in the db
 // and associated dbobject.
+
     $query = "select file_oembed.file_id as file_id from file join file_oembed on file.id = file_oembed.file_id where file.url='$longurl'";
     $file = new File;
     $file->query($query);
     $file->fetch();
 
     if (!empty($file->file_id)) {
+        $is_attachment = true;
+        $attachment_id = $file->file_id;
+
         $query = "select file_thumbnail.file_id as file_id from file join file_thumbnail on file.id = file_thumbnail.file_id where file.url='$longurl'";
         $file2 = new File;
         $file2->query($query);
         $file2->fetch();
 
-        if (empty($file2->file_id)) {
-            $attrs['class'] = 'attachment';
-        } else {
+        if (!empty($file2)) {
+            $has_thumb = true;
+        }
+    }
+
+    // Add clippy
+    if ($is_attachment) {
+        $attrs['class'] = 'attachment';
+        if ($has_thumb) {
             $attrs['class'] = 'attachment thumbnail';
         }
-        $attrs['id'] = "attachment-{$file->file_id}";
+        $attrs['id'] = "attachment-{$attachment_id}";
     }
+
     return XMLStringer::estring('a', $attrs, $display);
 }