Not absolutely, but the best chance is to specify "SORT_IN_TEMPDB = ON" when you rebuild the index for compression. That will SQL will use tempdb for the work space instead of the main db.
Btw, you can't compress a heap, so I assume you meant it was a heap before you created a compressed clustered index to cause the table to compress.
SQL DBA,SQL Server MVP(07, 08, 09) "It's a dog-eat-dog world, and I'm wearing Milk-Bone underwear." "Norm", on "Cheers". Also from "Cheers", from "Carla": "You need to know 3 things about Tortelli men: Tortelli men draw women like flies; Tortelli men treat women like flies; Tortelli men's brains are in their flies".