diff --git a/kallithea/templates/changeset/diff_block.html b/kallithea/templates/changeset/diff_block.html
--- a/kallithea/templates/changeset/diff_block.html
+++ b/kallithea/templates/changeset/diff_block.html
@@ -4,13 +4,13 @@
                        cs_repo_name, cs_ref_name, cs_ref_type, cs_rev,
                        file_diff_data)">
 <div class="diff-collapse">
-    <span data-target="${'no-padding-%s' % (id(file_diff_data))}" class="diff-collapse-button">&uarr; ${_('Collapse Diff')} &uarr;</span>
+    <span data-target="${'diff-container-%s' % (id(file_diff_data))}" class="diff-collapse-button">&uarr; ${_('Collapse Diff')} &uarr;</span>
 </div>
 %for id_fid, url_fid, op, a_filename, cs_filename, diff, stats in file_diff_data:
     ${diff_block_diffblock(id_fid, url_fid, op, diff,
         a_repo_name, a_rev, a_ref_type, a_ref_name, a_filename,
         cs_repo_name, cs_rev, cs_ref_type, cs_ref_name, cs_filename,
-        'no-padding-%s' % id(file_diff_data))}
+        'diff-container-%s' % id(file_diff_data))}
 %endfor
 </%def>