diff -up rtracklayer/DESCRIPTION.zlibbioc rtracklayer/DESCRIPTION
--- rtracklayer/DESCRIPTION.zlibbioc	2013-02-22 14:45:44.598260665 +0100
+++ rtracklayer/DESCRIPTION	2013-02-22 14:45:56.917260850 +0100
@@ -5,7 +5,7 @@ Author: Michael Lawrence, Vince Carey, R
 Depends: R (>= 2.10), methods, GenomicRanges (>= 1.9.6)
 Imports: XML (>= 1.98-0), BiocGenerics (>= 0.1.0), IRanges (>=
         1.15.37), GenomicRanges, Biostrings (>= 2.25.6), BSgenome (>=
-        1.23.1), zlibbioc, RCurl (>= 1.4-2), Rsamtools (>= 1.7.3)
+        1.23.1), RCurl (>= 1.4-2), Rsamtools (>= 1.7.3)
 Suggests: humanStemCell, microRNA (>= 1.1.1), genefilter, limma,
         org.Hs.eg.db, BSgenome.Hsapiens.UCSC.hg19,
         TxDb.Hsapiens.UCSC.hg19.knownGene, hgu133plus2.db
diff -up rtracklayer/NAMESPACE.zlibbioc rtracklayer/NAMESPACE
--- rtracklayer/NAMESPACE.zlibbioc	2013-02-22 14:46:17.804261163 +0100
+++ rtracklayer/NAMESPACE	2013-02-22 14:46:21.474261218 +0100
@@ -1,7 +1,5 @@
 useDynLib(rtracklayer, .registration = TRUE)
 
-import(zlibbioc)
-
 importFrom("stats", offset)
 
 importFrom("XML", getNodeSet, xmlValue, xmlAttrs, htmlTreeParse,