diff --git a/classes/ament-python.bbclass b/classes/ament-python.bbclass
index b7890167488..70f39c2c701 100644
--- a/classes/ament-python.bbclass
+++ b/classes/ament-python.bbclass
@@ -1,6 +1,4 @@
-# Copyright (c) 2018 LG Electronics, Inc.
-
-ROS_BPN ?= "${@d.getVar('BPN', True).replace('-', '_')}"
+# Copyright (c) 2018-2019 LG Electronics, Inc.
 
 S = "${WORKDIR}/git/${ROS_BPN}"
 
diff --git a/classes/ament.bbclass b/classes/ament.bbclass
index ed1b57fa413..4989227b0b8 100644
--- a/classes/ament.bbclass
+++ b/classes/ament.bbclass
@@ -18,8 +18,6 @@ DEPENDS_append = " \
     ament-cmake-test-native \
 "
 
-ROS_BPN ?= "${@d.getVar('BPN', True).replace('-', '_')}"
-
 S = "${WORKDIR}/git/${ROS_BPN}"
 
 EXTRA_OECMAKE_append = " -DBUILD_TESTING=OFF -DPYTHON_SOABI=cpython-35m-${TUNE_ARCH}-${TARGET_OS}${ARMPKGSFX_EABI}"
diff --git a/classes/ros_component.bbclass b/classes/ros_component.bbclass
index 90bb38a0734..88d3238b0ce 100644
--- a/classes/ros_component.bbclass
+++ b/classes/ros_component.bbclass
@@ -10,6 +10,10 @@ export ROS_PYTHON_VERSION
 # in generated-ros-distro.inc, ie, it will never be unset when we get here.
 PYTHON_PN ??= "${@'python3' if d.getVar('ROS_PYTHON_VERSION', True) == '3' else 'python'}"
 
+ROS_BPN = "${@d.getVar('BPN', True).replace('-', '_')}"
+ROS_SPN ?= "${ROS_BPN}"
+ROS_SP = "${ROS_SPN}-${PV}"
+
 inherit faulty-solibs
 FILES_${PN}_prepend = " \
     ${datadir}/${ROS_BPN} \
diff --git a/classes/ros_opt_prefix.bbclass b/classes/ros_opt_prefix.bbclass
index b8ec16f23f0..9f29c854c45 100644
--- a/classes/ros_opt_prefix.bbclass
+++ b/classes/ros_opt_prefix.bbclass
@@ -3,11 +3,6 @@
 # Copyright (c) 2019 LG Electronics, Inc.
 #
 
-ROS_BPN = "${@d.getVar('BPN', True).replace('-', '_')}"
-
-ROS_SPN ?= "${ROS_BPN}"
-ROS_SP = "${ROS_SPN}-${PV}"
-
 ros_prefix = "${base_prefix}/opt/ros/${ROS_DISTRO}"
 
 ros_bindir = "${ros_prefix}/bin"