diff --git a/addressbook/inc/class.contacts_ldap.inc.php b/addressbook/inc/class.contacts_ldap.inc.php
index a6e68e2de4..ec8efb4311 100644
--- a/addressbook/inc/class.contacts_ldap.inc.php
+++ b/addressbook/inc/class.contacts_ldap.inc.php
@@ -741,7 +741,7 @@
 					$err = ldap_delete($this->ldap,$entry['dn']);
 				}
 
-				$this->db->query("DELETE FROM $this->ext_table WHERE owner=$owner",__LINE__,__FILE__);
+				$this->db->query("DELETE FROM $this->ext_table WHERE contact_owner=$owner",__LINE__,__FILE__);
 			}
 			return;
 		}
diff --git a/addressbook/inc/class.contacts_sql.inc.php b/addressbook/inc/class.contacts_sql.inc.php
index da8284b5c5..bc347a8364 100644
--- a/addressbook/inc/class.contacts_sql.inc.php
+++ b/addressbook/inc/class.contacts_sql.inc.php
@@ -590,7 +590,7 @@
 			if ($owner)
 			{
 				$this->db->query("DELETE FROM $this->std_table WHERE owner=$owner",__LINE__,__FILE__);
-				$this->db->query("DELETE FROM $this->ext_table WHERE owner=$owner",__LINE__,__FILE__);
+				$this->db->query("DELETE FROM $this->ext_table WHERE contact_owner=$owner",__LINE__,__FILE__);
 			}
 			return;
 		}