Wake Me When You Need Me

200px|right Wake Me When You Need Me is a song included in the Halo 3: Original Soundtrack. It plays during the final cutscene of Halo 3.

It starts with a wind and strings melody variation of the Gregorian chant of the Halo Theme. Later, deeper strings join in and take on the main melody, which is instantly recognized as Dust and Echoes from the ending of Halo 1. At 1:45, the song changes to a minor key, only to be followed by a major chord at the end.

The name of the song is derived from the final words of John-117: "Wake me... when you need me."

It runs for 2:19.