diff --git a/pyarchivefile.py b/pyarchivefile.py
index 0e5059e..a3ca0c1 100755
--- a/pyarchivefile.py
+++ b/pyarchivefile.py
@@ -433,12 +433,6 @@ def decode_unicode_escape(value):
         compressionsupport.append("xz")
     except ImportError:
         pass
-compressionsupport.append("zlib")
-compressionsupport.append("zl")
-compressionsupport.append("zz")
-compressionsupport.append("zcompress")
-compressionsupport.append("Z")
-compressionsupport.append("z")
 
 compressionlist = ['auto']
 compressionlistalt = []
@@ -493,13 +487,6 @@ def decode_unicode_escape(value):
     outextlistwd.append('.zl')
     outextlist.append('zlib')
     outextlistwd.append('.zlib')
-if('zcompress' in compressionsupport):
-    compressionlist.append('zcompress')
-    compressionlistalt.append('zcompress')
-    outextlist.append('Z')
-    outextlistwd.append('.Z')
-    outextlist.append('z')
-    outextlistwd.append('.z')
 
 
 if __name__ == "__main__":