diff --git a/rhodecode/templates/files/files_source.html b/rhodecode/templates/files/files_source.html
--- a/rhodecode/templates/files/files_source.html
+++ b/rhodecode/templates/files/files_source.html
@@ -25,7 +25,7 @@
               ${h.link_to(_('show as raw'),h.url('files_raw_home',repo_name=c.repo_name,revision=c.file_changeset.raw_id,f_path=c.f_path),class_="ui-btn")}
               ${h.link_to(_('download as raw'),h.url('files_rawfile_home',repo_name=c.repo_name,revision=c.file_changeset.raw_id,f_path=c.f_path),class_="ui-btn")}
               % if h.HasRepoPermissionAny('repository.write','repository.admin')(c.repo_name):
-               % if c.on_branch_head and c.changeset.branch and c.file.is_binary is False:
+               % if c.on_branch_head and c.changeset.branch and not c.file.is_binary:
                 ${h.link_to(_('edit on branch:%s') % c.changeset.branch,h.url('files_edit_home',repo_name=c.repo_name,revision=c.changeset.branch,f_path=c.f_path),class_="ui-btn")}
                %else:
                 ${h.link_to(_('edit on branch:?'), '#', class_="ui-btn disabled tooltip", title=_('Editing files allowed only when on branch head revision'))}