diff --git a/classes/catkin_ros_prefix.bbclass b/classes/catkin_ros_prefix.bbclass
index 8cc75dc..d35b0cd 100644
--- a/classes/catkin_ros_prefix.bbclass
+++ b/classes/catkin_ros_prefix.bbclass
@@ -8,7 +8,7 @@ ROS_BPN = "${@d.getVar('BPN', True).replace('-', '_')}"
 ROS_SPN ?= "${ROS_BPN}"
 ROS_SP = "${ROS_SPN}-${PV}"
 
-export ros_prefix = "${base_prefix}/opt/ros/${ROSDISTRO}"
+export ros_prefix = "${base_prefix}/opt/ros/${ROS_DISTRO}"
 
 export ros_bindir = "${ros_prefix}/bin"
 export ros_libdir = "${ros_prefix}/${baselib}"