diff --git a/src/Composer/Command/GlobalCommand.php b/src/Composer/Command/GlobalCommand.php
index 89a7c701f..f03a2f04b 100644
--- a/src/Composer/Command/GlobalCommand.php
+++ b/src/Composer/Command/GlobalCommand.php
@@ -43,6 +43,9 @@ is to add the COMPOSER_HOME/vendor/bin dir to your PATH env var.
 COMPOSER_HOME is c:\Users\<user>\AppData\Roaming\Composer on Windows
 and /home/<user>/.composer on unix systems.
 
+Note: This path may vary depending on customizations to bin-dir in 
+composer.json or the environmental variable COMPOSER_BIN_DIR.
+
 EOT
             )
         ;