diff --git a/src/source/initializing.md b/src/source/initializing.md
index 7d90f43..51f5123 100644
--- a/src/source/initializing.md
+++ b/src/source/initializing.md
@@ -67,6 +67,9 @@
     $ sudo apt-get update
     $ sudo apt-get install sun-java5-jdk
 
+*Note: The `lunch` command in the build step will ensure that the Sun JDK is
+used instead of any previously installed JDK.*
+
 ## Installing required packages (Ubuntu 10.04 -- 11.10) ##
 
 Ubuntu 10.04 64-bit is recommended.  Building using a newer version of Ubuntu or a 32-bit Ubuntu is