diff --git a/doc/bugs/bzr_plugin_does_not_define_rcs__95__diff.mdwn b/doc/bugs/bzr_plugin_does_not_define_rcs__95__diff.mdwn
new file mode 100644
index 000000000..e57924131
--- /dev/null
+++ b/doc/bugs/bzr_plugin_does_not_define_rcs__95__diff.mdwn
@@ -0,0 +1,12 @@
+The bzr plugin does not seem to define the rcs_diff subroutine.
+I got the follow error after enabling recentchangesdiff:
+
+"Undefined subroutine &IkiWiki::Plugin::bzr::rcs_diff called at /usr/share/perl5/IkiWiki.pm line 1590."
+
+Grepping to verify absence of rcs_diff:
+
+    $ grep rcs_diff /usr/share/perl5/IkiWiki/Plugin/{git,bzr}.pm
+    /usr/share/perl5/IkiWiki/Plugin/git.pm:	hook(type => "rcs", id => "rcs_diff", call => \&rcs_diff);
+    /usr/share/perl5/IkiWiki/Plugin/git.pm:sub rcs_diff ($) {
+    /usr/share/perl5/IkiWiki/Plugin/bzr.pm:	hook(type => "rcs", id => "rcs_diff", call => \&rcs_diff);
+