diff --git a/lib/zlib/deflate.c b/lib/zlib/deflate.c
index 4549f4d..7e1ed4f 100644
--- a/lib/zlib/deflate.c
+++ b/lib/zlib/deflate.c
@@ -196,37 +196,30 @@
     zmemzero((Bytef *)s->head, (unsigned)(s->hash_size-1)*sizeof(*s->head));
 
 /* ========================================================================= */
-int ZEXPORT deflateInit_(strm, level, version, stream_size)
+int ZEXPORT deflateInit_(strm, level, stream_size)
     z_streamp strm;
     int level;
-    const char *version;
     int stream_size;
 {
     return deflateInit2_(strm, level, Z_DEFLATED, MAX_WBITS, DEF_MEM_LEVEL,
-                         Z_DEFAULT_STRATEGY, version, stream_size);
+                         Z_DEFAULT_STRATEGY, stream_size);
     /* To do: ignore strm->next_in if we use it as window */
 }
 
 /* ========================================================================= */
 int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
-                  version, stream_size)
+                  stream_size)
     z_streamp strm;
     int  level;
     int  method;
     int  windowBits;
     int  memLevel;
     int  strategy;
-    const char *version;
     int stream_size;
 {
     deflate_state *s;
     int wrap = 1;
-    static const char my_version[] = ZLIB_VERSION;
 
-    if (version == Z_NULL || version[0] != my_version[0] ||
-        stream_size != sizeof(z_stream)) {
-        return Z_VERSION_ERROR;
-    }
     if (strm == Z_NULL) return Z_STREAM_ERROR;
 
     strm->msg = Z_NULL;