diff --git a/libsigc++20.spec b/libsigc++20.spec
index 2141682..abb10b9 100644
--- a/libsigc++20.spec
+++ b/libsigc++20.spec
@@ -43,7 +43,6 @@ needed for development with %{name}.
 Summary:        Documentation for %{name}, includes full API docs
 Group:          Documentation
 BuildArch:      noarch
-BuildRequires:  doxygen graphviz
 Requires:       %{name} = %{version}-%{release}
 
 %description    doc
@@ -104,6 +103,7 @@ rm -rf $RPM_BUILD_ROOT
 - Dropped R: pkgconfig from -devel as it's now automatically added by rpm
 - Own /usr/share/doc/libsigc++-2.0/ dir and mark /usr/share/devhelp/ as %%doc
 - Require base package from -doc subpackage
+- Drop unneeded doxygen and graphviz BRs
 
 * Mon Feb 21 2011 Haïkel Guémar <hguemar@fedoraproject.org> - 2.2.8-3
 - fix documentation location (RHBZ #678981)