diff --git a/COPYING b/COPYING
index 86fad49..8c181d6 100644
--- a/COPYING
+++ b/COPYING
@@ -18,8 +18,3 @@
   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
   OTHER DEALINGS IN THE SOFTWARE.
-
-  Except as contained in this notice, the name of the author shall
-  not be used in advertising or otherwise to promote the sale, use or
-  other dealings in this Software without prior written authorization
-  from the author.
diff --git a/NEWS b/NEWS
index dd9d6e8..49ec259 100644
--- a/NEWS
+++ b/NEWS
@@ -9,6 +9,7 @@ Release 1.0.4
    CRC16 header checksum when checksum checking is enabled.
  * Improve optimize declarations, especially for LispWorks performance.
  * Remove no longer needed muffle annotations for SBCL.
+ * Remove non-endorsement clause from license, making it pure MIT.
 
 Release 1.0.3
 =============
diff --git a/deflate.asd b/deflate.asd
index 9a103fc..e0d3532 100644
--- a/deflate.asd
+++ b/deflate.asd
@@ -21,11 +21,6 @@
 ;;;; ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 ;;;; OTHER DEALINGS IN THE SOFTWARE.
 ;;;;
-;;;; Except as contained in this notice, the name of the author shall
-;;;; not be used in advertising or otherwise to promote the sale, use or
-;;;; other dealings in this Software without prior written authorization
-;;;; from the author.
-;;;; 
 ;;;; $Id$
 
 (cl:in-package #:cl-user)
@@ -41,6 +36,6 @@
   :description "Deflate Decompression Library"
   :author "Pierre R. Mai <pmai@pmsf.de>"
   :maintainer "Pierre R. Mai <pmai@pmsf.de>"
-  :licence "MIT/X11"
+  :licence "MIT"
   :version "1.0.4"
   :components ((:file "deflate")))
diff --git a/deflate.lisp b/deflate.lisp
index bb7174d..0f88c04 100644
--- a/deflate.lisp
+++ b/deflate.lisp
@@ -21,11 +21,6 @@
 ;;;; ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 ;;;; OTHER DEALINGS IN THE SOFTWARE.
 ;;;;
-;;;; Except as contained in this notice, the name of the author shall
-;;;; not be used in advertising or otherwise to promote the sale, use or
-;;;; other dealings in this Software without prior written authorization
-;;;; from the author.
-;;;; 
 ;;;; $Id$
 
 (cl:defpackage #:deflate