Index: rosdep.yaml
===================================================================
--- rosdep.yaml	(revision 38186)
+++ rosdep.yaml	(working copy)
@@ -40,3 +40,4 @@
     oneiric:
       apt:
         packages: [libopencv2.3-dev=2.3.1+svn6514+branch23-7~oneiric]
+  gentoo: ">=media-libs/opencv-2.3.1"