$OpenBSD$
--- libavogadro/src/CMakeLists.txt.orig	Mon Sep  3 21:07:01 2012
+++ libavogadro/src/CMakeLists.txt	Thu Jan 10 01:22:58 2013
@@ -13,6 +13,7 @@ include_directories(
   ${CMAKE_CURRENT_BINARY_DIR}
   ${EIGEN2_INCLUDE_DIR}
   ${OPENBABEL2_INCLUDE_DIR}
+  ${OPENGL_INCLUDE_DIR}
 )
 
 # I think this is necessary now in order to tell the linker where openbabel is
