diff --git a/Migration.md b/Migration.md
index ae59219..bf35224 100644
--- a/Migration.md
+++ b/Migration.md
@@ -5,6 +5,11 @@ Deprecated code produces compile-time warnings. These warning serve as
 notification to users that their code should be upgraded. The next major
 release will remove the deprecated code.
 
+## Gazebo Tools 2.X to 3.X
+
+* The environment variable `IGN_CONFIG_PATH` is removed.
+Use `GZ_CONFIG_PATH` instead.
+
 ## Gazebo Tools 1.X to 2.X
 
 * This package now depends on gz-cmake
diff --git a/src/gz.in b/src/gz.in
index 14e456f..12ba4be 100755
--- a/src/gz.in
+++ b/src/gz.in
@@ -49,12 +49,8 @@ yaml_found = false
 
 conf_dirs = '@CMAKE_INSTALL_PREFIX@/share/gz/'
 conf_dirs = ENV['GZ_CONFIG_PATH'] if ENV.key?('GZ_CONFIG_PATH')
-
 conf_dirs = conf_dirs.split('@ENV_PATH_DELIMITER@')
 
-# Deprecated
-conf_dirs.append(ENV['IGN_CONFIG_PATH']) if ENV.key?('IGN_CONFIG_PATH')
-
 conf_dirs.each do |conf_directory|
   next if Dir.glob(conf_directory + '/*.yaml').empty?