diff --git a/pym/cl_builder.py b/pym/cl_builder.py
index dd1c672..80e21aa 100644
--- a/pym/cl_builder.py
+++ b/pym/cl_builder.py
@@ -244,6 +244,13 @@ class cl_builder(color_print):
                   distrPath)
         self.printByResult(True);
 
+    def updateMan(self, distrPath):
+        """Execute update man"""
+        self.printMessageForTest(_("Execute '%s'")%"mandb")
+        # run mandb
+        self.runChroot(distrPath,'/usr/bin/mandb')
+        self.printByResult(True);
+
     def updatePortage(self,builderPath):
         """Change branch to master and update portage"""
         if self.assembleIso:
@@ -278,6 +285,7 @@ class cl_builder(color_print):
         mp = self.clVars.Get('cl_builder_path')
         self.dispatchConf(mp)
         self.updatePortage(mp)
+        self.updateMan(mp)
 
         # unmount all from source distribute
         mps = filter(lambda x:x!=mp,map(lambda x:x[1],childMounts(mp)))