diff --git a/install/dist/lib/fedora.lib.php b/install/dist/lib/fedora.lib.php
index d49c51f67188ec5bc3dfb5fdd3bb5dd0799c4daf..2eca52883c0704a1e45c1a8583eb1130935bf215 100644
--- a/install/dist/lib/fedora.lib.php
+++ b/install/dist/lib/fedora.lib.php
@@ -1052,9 +1052,8 @@ class installer_dist extends installer_base {
 		replaceLine('/etc/sudoers','Defaults    requiretty','#Defaults    requiretty',0,0);
 		
 		if(is_dir($install_dir.'/interface/invoices')) {
-			chmod($install_dir.'/interface/invoices', 0770);
-			chown($install_dir.'/interface/invoices', 'ispconfig');
-			chgrp($install_dir.'/interface/invoices', 'ispconfig');
+			exec('chmod -R 770 '.escapeshellarg($install_dir.'/interface/invoices'));
+			exec('chown -R ispconfig:ispconfig '.escapeshellarg($install_dir.'/interface/invoices'));
 		}
 		
 	}
diff --git a/install/dist/lib/gentoo.lib.php b/install/dist/lib/gentoo.lib.php
index 6fa2f554fb3879b1827e8977f75217f2778516c6..38173fb72183f5d46ddbf309018633331ceec7d5 100644
--- a/install/dist/lib/gentoo.lib.php
+++ b/install/dist/lib/gentoo.lib.php
@@ -875,9 +875,8 @@ class installer extends installer_base
 		}
 		
 		if(is_dir($install_dir.'/interface/invoices')) {
-			chmod($install_dir.'/interface/invoices', 0770);
-			chown($install_dir.'/interface/invoices', 'ispconfig');
-			chgrp($install_dir.'/interface/invoices', 'ispconfig');
+			exec('chmod -R 770 '.escapeshellarg($install_dir.'/interface/invoices'));
+			exec('chown -R ispconfig:ispconfig '.escapeshellarg($install_dir.'/interface/invoices'));
 		}
 		
 		// TODO: FIXME: add the www-data user to the ispconfig group. This is just for testing
diff --git a/install/dist/lib/opensuse.lib.php b/install/dist/lib/opensuse.lib.php
index 5737b243876c8111cdfdf6d02b1b80d795ab7e8c..e02f7876c11868386222e50ac077f1d387a364a2 100644
--- a/install/dist/lib/opensuse.lib.php
+++ b/install/dist/lib/opensuse.lib.php
@@ -1084,9 +1084,8 @@ class installer_dist extends installer_base {
 		}
 		
 		if(is_dir($install_dir.'/interface/invoices')) {
-			chmod($install_dir.'/interface/invoices', 0770);
-			chown($install_dir.'/interface/invoices', 'ispconfig');
-			chgrp($install_dir.'/interface/invoices', 'ispconfig');
+			exec('chmod -R 770 '.escapeshellarg($install_dir.'/interface/invoices'));
+			exec('chown -R ispconfig:ispconfig '.escapeshellarg($install_dir.'/interface/invoices'));
 		}
 		
 		
diff --git a/install/lib/installer_base.lib.php b/install/lib/installer_base.lib.php
index a8142b91f45d298902645d706563e3c04c26f197..3ee0a353b58b8f73c43366158e605cb7585efd06 100644
--- a/install/lib/installer_base.lib.php
+++ b/install/lib/installer_base.lib.php
@@ -1771,9 +1771,8 @@ class installer_base {
 		}
 		
 		if(is_dir($install_dir.'/interface/invoices')) {
-			chmod($install_dir.'/interface/invoices', 0770);
-			chown($install_dir.'/interface/invoices', 'ispconfig');
-			chgrp($install_dir.'/interface/invoices', 'ispconfig');
+			exec('chmod -R 770 '.escapeshellarg($install_dir.'/interface/invoices'));
+			exec('chown -R ispconfig:ispconfig '.escapeshellarg($install_dir.'/interface/invoices'));
 		}
 
 		// TODO: FIXME: add the www-data user to the ispconfig group. This is just for testing