1 files changed, 4 insertions, 3 deletions
diff --git a/compress.c b/compress.c
index a541af4..be9ef64 100644
--- a/compress.c
+++ b/compress.c
@@ -1,5 +1,5 @@
 /* compress.c -- compress a memory buffer
- * Copyright (C) 1995 Jean-loup Gailly.
+ * Copyright (C) 1995-1996 Jean-loup Gailly.
  * For conditions of distribution and use, see copyright notice in zlib.h 
  */
 
@@ -22,13 +22,13 @@
 int compress (dest, destLen, source, sourceLen)
     Bytef *dest;
     uLongf *destLen;
-    Bytef *source;
+    const Bytef *source;
     uLong sourceLen;
 {
     z_stream stream;
     int err;
 
-    stream.next_in = source;
+    stream.next_in = (Bytef*)source;
     stream.avail_in = (uInt)sourceLen;
     /* Check for source > 64K on 16-bit machine: */
     if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
@@ -39,6 +39,7 @@ int compress (dest, destLen, source, sourceLen)
 
     stream.zalloc = (alloc_func)0;
     stream.zfree = (free_func)0;
+    stream.opaque = (voidpf)0;
 
     err = deflateInit(&stream, Z_DEFAULT_COMPRESSION);
     if (err != Z_OK) return err;