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;