diff --git a/htdocs/core/class/html.formprojet.class.php b/htdocs/core/class/html.formprojet.class.php
index 47706d90d7f..b85c485e681 100644
--- a/htdocs/core/class/html.formprojet.class.php
+++ b/htdocs/core/class/html.formprojet.class.php
@@ -153,7 +153,14 @@ class FormProjets
 		$sql.= " WHERE p.entity IN (".getEntity('project', 1).")";
 		if ($projectsListId !== false) $sql.= " AND p.rowid IN (".$projectsListId.")";
 		if ($socid == 0) $sql.= " AND (p.fk_soc=0 OR p.fk_soc IS NULL)";
-		if ($socid > 0 && empty($conf->global->PROJECT_ALLOW_TO_LINK_FROM_OTHER_COMPANY))  $sql.= " AND (p.fk_soc=".$socid." OR p.fk_soc IS NULL)";
+		if ($socid > 0)
+		{
+		    if (empty($conf->global->PROJECT_ALLOW_TO_LINK_FROM_OTHER_COMPANY))  $sql.= " AND (p.fk_soc=".$socid." OR p.fk_soc IS NULL)";
+		    else if ($conf->global->PROJECT_ALLOW_TO_LINK_FROM_OTHER_COMPANY != 'all')    // PROJECT_ALLOW_TO_LINK_FROM_OTHER_COMPANY is 'all' or a list of ids separated by coma.
+		    {
+		        $sql.= " AND (p.fk_soc IN (".$socid.", ".$conf->global->PROJECT_ALLOW_TO_LINK_FROM_OTHER_COMPANY.") OR p.fk_soc IS NULL)";
+		    }
+		}
 		if (!empty($filterkey)) {
 			$sql .= ' AND (';
 			$sql .= ' p.title LIKE "%'.$this->db->escape($filterkey).'%"';