diff --git a/irobot_create_ignition/irobot_create_ignition_bringup/launch/ignition.launch.py b/irobot_create_ignition/irobot_create_ignition_bringup/launch/ignition.launch.py
index 835cc937..7de5822c 100644
--- a/irobot_create_ignition/irobot_create_ignition_bringup/launch/ignition.launch.py
+++ b/irobot_create_ignition/irobot_create_ignition_bringup/launch/ignition.launch.py
@@ -9,7 +9,7 @@
 
 from launch import LaunchDescription
 from launch.actions import DeclareLaunchArgument
-from launch.actions import IncludeLaunchDescription, SetEnvironmentVariable
+from launch.actions import IncludeLaunchDescription, AppendEnvironmentVariable
 from launch.launch_description_sources import PythonLaunchDescriptionSource
 from launch.substitutions import LaunchConfiguration, PathJoinSubstitution
 from launch_ros.actions import Node
@@ -37,7 +37,7 @@ def generate_launch_description():
         'ros_ign_gazebo')
 
     # Set Ignition resource path
-    ign_resource_path = SetEnvironmentVariable(name='IGN_GAZEBO_RESOURCE_PATH',
+    ign_resource_path = AppendEnvironmentVariable(name='IGN_GAZEBO_RESOURCE_PATH',
                                                value=[os.path.join(
                                                       pkg_irobot_create_ignition_bringup,
                                                       'worlds'), ':' +
@@ -45,7 +45,7 @@ def generate_launch_description():
                                                           pkg_irobot_create_description).
                                                           parent.resolve())])
 
-    ign_gui_plugin_path = SetEnvironmentVariable(name='IGN_GUI_PLUGIN_PATH',
+    ign_gui_plugin_path = AppendEnvironmentVariable(name='IGN_GUI_PLUGIN_PATH',
                                                  value=[os.path.join(
                                                         pkg_irobot_create_ignition_plugins,
                                                         'lib')])