diff --git a/install/upgrades/1.0.1.php b/install/upgrades/1.0.1.php
index 9946732e..e88222bc 100644
--- a/install/upgrades/1.0.1.php
+++ b/install/upgrades/1.0.1.php
@@ -7,10 +7,14 @@ if(!function_exists('mysql_connect'))  {
     exit(1);
 }
 
-// we don't check our AlternC session
-if(!chdir("/var/alternc/bureau"))
-  exit(1);
-require("/var/alternc/bureau/class/config_nochk.php");
+// If we upgrade directly to 3.1 the panel directory change
+$panel='';
+if(chdir("/usr/share/alternc/panel")) $panel='/usr/share/alternc/panel';
+elseif (chdir("/var/alternc/bureau")) $panel='/var/alternc/bureau';
+
+if (empty($panel)) { echo "Problem to load panel library"; exit(1); }
+
+require("$panel/class/config_nochk.php");
 
 // we go super-admin
 $admin->enabled=1;
@@ -33,4 +37,4 @@ foreach($domains as $v) {
 $dom->unlock();
 
 
-?>
\ No newline at end of file
+?>
diff --git a/install/upgrades/3.0.0~3.php b/install/upgrades/3.0.0~3.php
index 22858ea3..709d9782 100644
--- a/install/upgrades/3.0.0~3.php
+++ b/install/upgrades/3.0.0~3.php
@@ -8,11 +8,14 @@ if(!function_exists('mysql_connect'))  {
     exit(1);
 }
 
+// If we upgrade directly to 3.1 the panel directory change
+$panel='';
+if(chdir("/usr/share/alternc/panel")) $panel='/usr/share/alternc/panel';
+elseif (chdir("/var/alternc/bureau")) $panel='/var/alternc/bureau';
 
-// we don't check our AlternC session
-if(!chdir("/var/alternc/bureau"))
-exit(1);
-require("/var/alternc/bureau/class/config_nochk.php");
+if (empty($panel)) { echo "Problem to load panel library"; exit(1); }
+
+require("$panel/class/config_nochk.php");
 
 $db2=new DB_System();
 // we go super-admin
diff --git a/install/upgrades/3.0.1.php b/install/upgrades/3.0.1.php
index 120f555a..a9658f52 100644
--- a/install/upgrades/3.0.1.php
+++ b/install/upgrades/3.0.1.php
@@ -7,10 +7,14 @@ if(!function_exists('mysql_connect'))  {
     exit(1);
 }
 
-// we don't check our AlternC session
-if(!chdir("/usr/share/alternc/panel"))
-exit(1);
-require("/usr/share/alternc/panel/class/config_nochk.php");
+// If we upgrade directly to 3.1 the panel directory change
+$panel='';
+if(chdir("/usr/share/alternc/panel")) $panel='/usr/share/alternc/panel';
+elseif (chdir("/var/alternc/bureau")) $panel='/var/alternc/bureau';
+
+if (empty($panel)) { echo "Problem to load panel library"; exit(1); }
+
+require("$panel/class/config_nochk.php");
 
 $db2=new DB_System();
 // we go super-admin