--- a/packages/services/compress/zlib/current/src/compress.c
+++ b/packages/services/compress/zlib/current/src/compress.c
@@ -1,10 +1,11 @@
 /* compress.c -- compress a memory buffer
  * Copyright (C) 1995-2002 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h 
+ * For conditions of distribution and use, see copyright notice in zlib.h
  */
 
 /* @(#) $Id$ */
 
+#define ZLIB_INTERNAL
 #ifdef __ECOS__
 #include <cyg/compress/zlib.h>
 #else
@@ -70,3 +71,13 @@ int ZEXPORT compress (dest, destLen, sou
 {
     return compress2(dest, destLen, source, sourceLen, Z_DEFAULT_COMPRESSION);
 }
+
+/* ===========================================================================
+     If the default memLevel or windowBits for deflateInit() is changed, then
+   this function needs to be updated.
+ */
+uLong ZEXPORT compressBound (sourceLen)
+    uLong sourceLen;
+{
+    return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) + 11;
+}