diff --git a/lib/libpam/openpam_dlfunc.h b/lib/libpam/openpam_dlfunc.h
index 6380c2d..4ef1402 100644
--- a/lib/libpam/openpam_dlfunc.h
+++ b/lib/libpam/openpam_dlfunc.h
@@ -10,6 +10,9 @@
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote
+ *    products derived from this software without specific prior written
+ *    permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE