diff --git a/lib/gzip.c b/lib/gzip.c
index 5d9c195..a9a3df5 100644
--- a/lib/gzip.c
+++ b/lib/gzip.c
@@ -67,7 +67,7 @@
 
 	r = deflateInit2_(&s, Z_BEST_SPEED, Z_DEFLATED,	window,
 			DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY,
-			ZLIB_VERSION, sizeof(z_stream));
+			sizeof(z_stream));
 	if (r != Z_OK) {
 		printf ("Error: deflateInit2_() returned %d\n", r);
 		return -1;
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;
diff --git a/lib/zlib/inflate.c b/lib/zlib/inflate.c
index 79c9e99..f7e81fc 100644
--- a/lib/zlib/inflate.c
+++ b/lib/zlib/inflate.c
@@ -30,14 +30,11 @@
     return Z_OK;
 }
 
-int ZEXPORT inflateInit2_(z_streamp strm, int windowBits, const char *version,
+int ZEXPORT inflateInit2_(z_streamp strm, int windowBits,
 			  int stream_size)
 {
     struct inflate_state FAR *state;
 
-    if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
-        stream_size != (int)(sizeof(z_stream)))
-        return Z_VERSION_ERROR;
     if (strm == Z_NULL) return Z_STREAM_ERROR;
     strm->msg = Z_NULL;                 /* in case we return an error */
     if (strm->zalloc == (alloc_func)0) {
@@ -70,9 +67,9 @@
     return inflateReset(strm);
 }
 
-int ZEXPORT inflateInit_(z_streamp strm, const char *version, int stream_size)
+int ZEXPORT inflateInit_(z_streamp strm, int stream_size)
 {
-    return inflateInit2_(strm, DEF_WBITS, version, stream_size);
+    return inflateInit2_(strm, DEF_WBITS, stream_size);
 }
 
 local void fixedtables(struct inflate_state FAR *state)
diff --git a/lib/zlib/zutil.c b/lib/zlib/zutil.c
index 609aac5..ec21b45 100644
--- a/lib/zlib/zutil.c
+++ b/lib/zlib/zutil.c
@@ -21,7 +21,6 @@
 "data error",          /* Z_DATA_ERROR    (-3) */
 "insufficient memory", /* Z_MEM_ERROR     (-4) */
 "buffer error",        /* Z_BUF_ERROR     (-5) */
-"incompatible version",/* Z_VERSION_ERROR (-6) */
 ""};
 
 #ifdef DEBUG