diff --git a/docbook-xsl-1.79.2-samba-4.8.1.patch b/docbook-xsl-1.79.2-samba-4.8.1.patch
new file mode 100644
index 0000000..1300499
--- /dev/null
+++ b/docbook-xsl-1.79.2-samba-4.8.1.patch
@@ -0,0 +1,25 @@
+--- docbook-xsl-1.79.2/lib/lib.xsl.orig	2016-12-09 23:41:39.000000000 +0100
++++ docbook-xsl-1.79.2/lib/lib.xsl	2018-05-09 13:50:28.378383717 +0200
+@@ -6,7 +6,11 @@
+ 
+      This module implements DTD-independent functions
+ 
+-     ******************************************************************** --><xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
++     ******************************************************************** -->
++<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
++                xmlns:str="http://exslt.org/strings"
++                exclude-result-prefixes="str"
++                version="1.0">
+ 
+ <xsl:template name="dot.count">
+   <!-- Returns the number of "." characters in a string -->
+@@ -52,6 +56,9 @@
+   <xsl:param name="replacement"/>
+ 
+   <xsl:choose>
++    <xsl:when test="function-available('str:replace')">
++      <xsl:value-of select="str:replace($string, string($target), string($replacement))"/>
++    </xsl:when>
+     <xsl:when test="contains($string, $target)">
+       <xsl:variable name="rest">
+         <xsl:call-template name="string.subst">
diff --git a/docbook-xsl.spec b/docbook-xsl.spec
index cbed73d..1794f29 100644
--- a/docbook-xsl.spec
+++ b/docbook-xsl.spec
@@ -1,6 +1,6 @@
 Name:          docbook-xsl
 Version:       1.79.2
-Release:       1mamba
+Release:       2mamba
 Summary:       Norman Walsh's XSL stylesheets for DocBook XML
 Group:         Applications/Publishing
 Vendor:        openmamba
@@ -12,6 +12,7 @@ Source1:       %{name}.Makefile
 Source2:       https://github.com/docbook/xslt10-stylesheets/releases/download/release%2F%{version}/docbook-xsl-nons-%{version}.tar.bz2
 Patch0:        docbook-xsl-marginleft.patch
 Patch1:        docbook-xsl-listblock.patch
+Patch2:        docbook-xsl-1.79.2-samba-4.8.1.patch
 License:       Distributable
 ## AUTOBUILDREQ-BEGIN
 ## AUTOBUILDREQ-END
@@ -28,6 +29,7 @@ These XSL stylesheets allow you to transform any DocBook XML document to other f
 #%patch0 -p1 -b .marginleft
 #%patch1 -p1 -b .listblock
 #cp %{SOURCE1} Makefile
+%patch2 -p1
 
 %build
 
@@ -118,6 +120,9 @@ exit 0
 #%doc BUGS README RELEASE-NOTES.* TODO doc docsrc
 
 %changelog
+* Wed May 09 2018 Silvan Calarco <silvan.calarco@mambasoft.it> 1.79.2-2mamba
+- patch lib.xsl to fix samba 4.8.0 build (https://forums.funtoo.org/topic/1257-samba-installation-fails-due-to-manpage/)
+
 * Sat Dec 23 2017 Silvan Calarco <silvan.calarco@mambasoft.it> 1.79.2-1mamba
 - update to 1.79.2