diff --git a/alabaster/layout.html b/alabaster/layout.html
index 0885d03..2b6eb91 100644
--- a/alabaster/layout.html
+++ b/alabaster/layout.html
@@ -94,9 +94,14 @@
       {% endif %}
       {%- if show_source and has_source and sourcename %}
       {% if show_copyright or theme_show_powered_by %}|{% endif %}
+      {%- if source_url_prefix %}
+      <a href="{{ source_url_prefix }}{{ pagename }}{{ source_suffix }}"
+          rel="nofollow">{{ _('Page source') }}</a>
+      {%- else %}
       <a href="{{ pathto('_sources/' + sourcename, true)|e }}"
           rel="nofollow">{{ _('Page source') }}</a>
       {%- endif %}
+      {%- endif %}
     </div>
 
     {% if theme_github_banner|lower != 'false' %}
diff --git a/alabaster/theme.conf b/alabaster/theme.conf
index b6cdc8d..53d4fc0 100644
--- a/alabaster/theme.conf
+++ b/alabaster/theme.conf
@@ -36,6 +36,7 @@ show_relbars = false
 sidebar_collapse = true
 sidebar_includehidden = true
 sidebar_width = 220px
+source_url_prefix =
 tidelift_url =
 touch_icon =
 travis_button = false
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 5f14e3e..293b49b 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -2,6 +2,8 @@
 Changelog
 =========
 
+- :feature:`87` Add support for arbitrary "edit source" link
+  targets. Credit: ``@anarcat``.
 - :release:`0.7.12 <2018-10-02>`
 - :bug:`-` On some browsers/platforms, 'badge'-style sidebar elements were
   displaying dotted underlines. This was unintentional and explicit styling has