diff --git a/include/u-boot/zlib.h b/include/u-boot/zlib.h
index a33cc87..ee19f46 100644
--- a/include/u-boot/zlib.h
+++ b/include/u-boot/zlib.h
@@ -49,9 +49,6 @@
 extern "C" {
 #endif
 
-#define ZLIB_VERSION "1.2.3"
-#define ZLIB_VERNUM 0x1230
-
 /* #include "zconf.h" */        /* included directly here */
 /* zconf.h -- configuration of the zlib compression library
  * Copyright (C) 1995-2005 Jean-loup Gailly.
@@ -484,7 +481,6 @@
 #define Z_DATA_ERROR   (-3)
 #define Z_MEM_ERROR    (-4)
 #define Z_BUF_ERROR    (-5)
-#define Z_VERSION_ERROR (-6)
 /* Return codes for the compression/decompression functions. Negative
  * values are errors, positive values are used for special but normal events.
  */
@@ -523,11 +519,11 @@
 
 ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
 ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level,
-			const char *version, int stream_size));
+			int stream_size));
 ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
 ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int  level, int  method,
 			int windowBits, int memLevel,
-			int strategy, const char *version,
+			int strategy,
 			int stream_size));
 ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
 ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
@@ -553,7 +549,7 @@
 
 
 ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm,
-			const char *version, int stream_size));
+			int stream_size));
 ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
 /*
     inflate decompresses as much data as possible, and stops when the input
@@ -743,11 +739,11 @@
 */
 
 ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int  windowBits,
-                                      const char *version, int stream_size));
+                                      int stream_size));
 #define inflateInit(strm) \
-	inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream))
+	inflateInit_((strm), sizeof(z_stream))
 #define inflateInit2(strm, windowBits) \
-	inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
+	inflateInit2_((strm), (windowBits), sizeof(z_stream))
 
 #if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
 	struct internal_state {int dummy;}; /* hack for buggy compilers */