diff --git a/include/sdf/config.hh.in b/include/sdf/config.hh.in
index 4d5612030..d1b3db532 100644
--- a/include/sdf/config.hh.in
+++ b/include/sdf/config.hh.in
@@ -45,8 +45,6 @@
 
 #define SDF_VERSION_HEADER "Simulation Description Format (SDF), version ${SDF_PROTOCOL_VERSION}\nCopyright (C) 2014 Open Source Robotics Foundation.\nReleased under the Apache 2 License.\nhttp://gazebosim.org/sdf\n\n"
 
-#cmakedefine HAVE_URDFDOM 1
-#cmakedefine USE_INTERNAL_URDF 1
 #cmakedefine SDFORMAT_DISABLE_CONSOLE_LOGFILE 1
 
 #define SDF_SHARE_PATH "${CMAKE_INSTALL_FULL_DATAROOTDIR}/"