Ray of Sickness missing from Compendium

Title says it all, I can't seem to find this Ray of Sickness in the compendium. I've tried looking for it under the warlock spells by level and by name, doesn't show up anyway. I've also tried searching for it in the search bar, but to no avail. Is the compendium just missing it, or am I missing something?

I could be wrong but Ray of Sickness wont be in the compendium as its part of the core rules but not the SRD, all items (Unless purchased) in your 5e compendium are governed by the open game licence, this does not extend to all items within the core rules (IE PHB or DMG) you will find a some items do not tally up between these resources. Hope this helps make things a little clearer.

As James has already stated: The 5th Edition SRD Compendium can only contain information (such as race and class options, feats, spells, treasure, monsters, etc.) that is located within WoTC's Systems Reference Document . If WoTC releases more SRD content under an Open Gaming License, you can count on that being added to the Compendium.

Oh, I see, so although it's in the PH, it's not in the SRD, which means that 3rd party companies like roll20 can't put it in their compendium?

Bingo :)