diff --git a/zlibWrapper/gzlib.c b/zlibWrapper/gzlib.c
index 2caf54e54..aa94206a8 100644
--- a/zlibWrapper/gzlib.c
+++ b/zlibWrapper/gzlib.c
@@ -3,7 +3,7 @@
 
 /* gzlib.c -- zlib functions common to reading and writing gzip files
  * Copyright (C) 2004-2017 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
+ * For conditions of distribution and use, see http://www.zlib.net/zlib_license.html
  */
 
 #include "gzguts.h"
diff --git a/zlibWrapper/gzread.c b/zlibWrapper/gzread.c
index 81f4fb082..d37aaa1d4 100644
--- a/zlibWrapper/gzread.c
+++ b/zlibWrapper/gzread.c
@@ -3,7 +3,7 @@
  
  /* gzread.c -- zlib functions for reading gzip files
  * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
+ * For conditions of distribution and use, see http://www.zlib.net/zlib_license.html
  */
 
 #include "gzguts.h"
diff --git a/zlibWrapper/gzwrite.c b/zlibWrapper/gzwrite.c
index af00e23c4..bcda4774a 100644
--- a/zlibWrapper/gzwrite.c
+++ b/zlibWrapper/gzwrite.c
@@ -3,7 +3,7 @@
  
  /* gzwrite.c -- zlib functions for writing gzip files
  * Copyright (C) 2004-2017 Mark Adler
- * For conditions of distribution and use, see copyright notice in zlib.h
+ * For conditions of distribution and use, see http://www.zlib.net/zlib_license.html
  */
 
 #include "gzguts.h"