diff --git a/pandora_server/ChangeLog b/pandora_server/ChangeLog
index 975939d369..14b1928f98 100644
--- a/pandora_server/ChangeLog
+++ b/pandora_server/ChangeLog
@@ -1,3 +1,11 @@
+2011-08-10  Junichi Satoh <junichi@rworks.jp>
+
+	* pandora_server.spec, pandora_server.redhat.spec: Added
+	perl-IO-Socket-INET6 to Requires.
+
+	* pandora_server_installer: Added IO::Socket::INET6 to dependency
+	messages.
+
 2011-08-10  Junichi Satoh <junichi@rworks.jp>
 
 	* lib/PandoraFMS/NetworkServer.pm: Added support for IPv6 tcp check.
diff --git a/pandora_server/pandora_server.redhat.spec b/pandora_server/pandora_server.redhat.spec
index c8c217a87c..36f60245ad 100644
--- a/pandora_server/pandora_server.redhat.spec
+++ b/pandora_server/pandora_server.redhat.spec
@@ -26,6 +26,7 @@ Requires:           coreutils
 Requires:           perl-DBI perl-DBD-mysql perl-libwww-perl
 Requires:           perl-XML-Simple net-snmp-utils
 Requires:           perl-NetAddr-IP net-snmp net-tools
+Requires:           perl-IO-Socket-INET6
 Requires:           nmap wmic sudo
 
 %description
diff --git a/pandora_server/pandora_server.spec b/pandora_server/pandora_server.spec
index b81265aa18..bc8eb5ad8f 100644
--- a/pandora_server/pandora_server.spec
+++ b/pandora_server/pandora_server.spec
@@ -24,6 +24,7 @@ Provides:           %{name}-%{version}
 Requires:           perl-DBI perl-DBD-mysql perl-libwww-perl
 Requires:           perl-NetAddr-IP net-snmp net-tools
 Requires:           nmap wmic sudo perl-HTML-Tree perl-XML-SAX
+Requires:           perl-IO-Socket-INET6
 
 %description
 Pandora FMS is a monitoring system for big IT environments. It uses remote tests, or local agents to grab information. Pandora supports all standard OS (Linux, AIX, HP-UX, Solaris and Windows XP,2000/2003), and support multiple setups in HA enviroments.
diff --git a/pandora_server/pandora_server_installer b/pandora_server/pandora_server_installer
index b8ce6ab21c..abf3d1b965 100755
--- a/pandora_server/pandora_server_installer
+++ b/pandora_server/pandora_server_installer
@@ -102,14 +102,14 @@ install () {
 		echo "For OpenSUSE / SLES do : "
 		echo " "
 		echo "	# zypper install install nmap perl-DBD-mysql perl-DBI perl-HTML-Parser 
-perl-HTML-Encoding perl-HTML-Tree perl-NetAddr-IP 
+perl-HTML-Encoding perl-HTML-Tree perl-NetAddr-IP perl-IO-Socket-INET6
 perl-TimeDate perl-XML-Simple perl-libwww-perl mysql-client"
 		echo " "
 		echo "	You also will need to install (optionally) xprobe2 and wmiclient from rpm (download from our website)"
 		echo " "
 		echo "For FreeBSD do : "
 		echo " "
-		echo "  Install perl5.8 from ports with thread enabled."
+		echo "  Install perl5.8 or later from ports with thread enabled."
 		echo "  (perl-5.8.x.pkg can not be used.)"
 		echo "  # cd /usr/ports/lang/perl5.8"
 		echo "  # make config"
@@ -118,12 +118,12 @@ perl-TimeDate perl-XML-Simple perl-libwww-perl mysql-client"
 		echo "  # make install"
 		echo " "
 		echo "  Install following tools from ports. Don't use packages."
-		echo "  Recommended: p5-DBI p5-NetAddr-IP p5-XML-Simple p5-HTML-Parser p5-DBD-mysql"
+		echo "  Recommended: p5-DBI p5-NetAddr-IP p5-XML-Simple p5-HTML-Parser p5-DBD-mysql p5-IO-Socket-INET6"
 		echo "  Optional: nmap xprobe"
 		echo " "
 		echo "To get it from source through CPAN do"
 		echo " "
-		echo "	$ cpan Time::Local DBI XML::Simple IO::Socket Time::HiRes NetAddr::IP HTML::Entities"
+		echo "	$ cpan Time::Local DBI XML::Simple IO::Socket Time::HiRes NetAddr::IP HTML::Entities IO::Socket::INET6"
 		echo " "
 		rm output
 	else