diff --git a/doc/building.dox b/doc/building.dox
index a1b5227e4..b4c55ca84 100644
--- a/doc/building.dox
+++ b/doc/building.dox
@@ -270,7 +270,7 @@ build and install Magnum like this:
 @code{.sh}
 git clone git://github.com/mosra/magnum && cd magnum
 cd package/gentoo
-sudo ebuild dev-libs/magnum/magnum-99999.ebuild manifest clean merge
+sudo ebuild dev-libs/magnum/magnum-9999.ebuild manifest clean merge
 @endcode
 
 If you want to pass additional flags to CMake or