diff --git a/lam/lib/modules/account.inc b/lam/lib/modules/account.inc
index 50ca8fc0..59feeb9d 100644
--- a/lam/lib/modules/account.inc
+++ b/lam/lib/modules/account.inc
@@ -67,7 +67,7 @@ class account {
 		return _('account');
 	}
 
-	function is_base_module() {
+	function is_base_module($scope) {
 		return false;
 	}
 
diff --git a/lam/lib/modules/inetOrgPerson.inc b/lam/lib/modules/inetOrgPerson.inc
index 5f585394..38b8e779 100644
--- a/lam/lib/modules/inetOrgPerson.inc
+++ b/lam/lib/modules/inetOrgPerson.inc
@@ -70,7 +70,7 @@ class inetOrgPerson {
 		return _('inetOrgPerson');
 	}
 
-	function is_base_module() {
+	function is_base_module($scope) {
 		return false;
 	}
 
diff --git a/lam/lib/modules/main.inc b/lam/lib/modules/main.inc
index 8ab20ab2..b9eb07dd 100644
--- a/lam/lib/modules/main.inc
+++ b/lam/lib/modules/main.inc
@@ -67,7 +67,7 @@ class main {
 		return _('main');
 		}
 
-	function is_base_module() {
+	function is_base_module($scope) {
 		return false;
 	}
 
diff --git a/lam/lib/modules/posixAccount.inc b/lam/lib/modules/posixAccount.inc
index 78d9ee67..76a8411b 100644
--- a/lam/lib/modules/posixAccount.inc
+++ b/lam/lib/modules/posixAccount.inc
@@ -133,10 +133,16 @@ class posixAccount {
 		return "posixAccount";
 	}
 
-	function is_base_module() {
+	function is_base_module($scope) {
 		return true;
 	}
 
+	// returns an LDAP filter for the account lists
+	// $scope: the account type ("user", "group", "host")
+	function get_ldap_filter($scope) {
+		return "(objectClass=posixAccount)";
+	}
+
 	/* This function returns a list with all required modules
 	*/
 	function get_dependencies($scope) {
diff --git a/lam/lib/modules/posixGroup.inc b/lam/lib/modules/posixGroup.inc
index 8ee8c87f..4cbaa38f 100644
--- a/lam/lib/modules/posixGroup.inc
+++ b/lam/lib/modules/posixGroup.inc
@@ -123,10 +123,16 @@ class posixGroup {
 		return _('posixGroup');
 		}
 
-	function is_base_module() {
+	function is_base_module($scope) {
 		return true;
 	}
 
+	// returns an LDAP filter for the account lists
+	// $scope: the account type ("user", "group", "host")
+	function get_ldap_filter($scope) {
+		return "(objectClass=posixGroup)";
+	}
+
 	/* This function returns a list with all required modules
 	*/
 	function get_dependencies($scope) {
diff --git a/lam/lib/modules/quota.inc b/lam/lib/modules/quota.inc
index 6f08df7b..993b7127 100644
--- a/lam/lib/modules/quota.inc
+++ b/lam/lib/modules/quota.inc
@@ -71,7 +71,7 @@ class quota {
 		return _('quota');
 		}
 
-	function is_base_module() {
+	function is_base_module($scope) {
 		return false;
 	}
 
diff --git a/lam/lib/modules/sambaAccount.inc b/lam/lib/modules/sambaAccount.inc
index 9d81f243..16e0e0da 100644
--- a/lam/lib/modules/sambaAccount.inc
+++ b/lam/lib/modules/sambaAccount.inc
@@ -126,7 +126,7 @@ class sambaAccount {
 		return _('sambaAccount');
 		}
 
-	function is_base_module() {
+	function is_base_module($scope) {
 		return false;
 	}
 
diff --git a/lam/lib/modules/sambaGroupMapping.inc b/lam/lib/modules/sambaGroupMapping.inc
index 005b8868..59c1f1a2 100644
--- a/lam/lib/modules/sambaGroupMapping.inc
+++ b/lam/lib/modules/sambaGroupMapping.inc
@@ -97,7 +97,7 @@ class sambaGroupMapping {
 		return _('sambaGroupMapping');
 		}
 
-	function is_base_module() {
+	function is_base_module($scope) {
 		return false;
 	}
 
diff --git a/lam/lib/modules/sambaSamAccount.inc b/lam/lib/modules/sambaSamAccount.inc
index 6cb17b91..a8de194a 100644
--- a/lam/lib/modules/sambaSamAccount.inc
+++ b/lam/lib/modules/sambaSamAccount.inc
@@ -126,7 +126,7 @@ class sambaSamAccount {
 		return _('sambaSamAccount');
 		}
 
-		function is_base_module() {
+		function is_base_module($scope) {
 		return false;
 	}
 
diff --git a/lam/lib/modules/shadowAccount.inc b/lam/lib/modules/shadowAccount.inc
index 87355024..4307b125 100644
--- a/lam/lib/modules/shadowAccount.inc
+++ b/lam/lib/modules/shadowAccount.inc
@@ -91,7 +91,7 @@ class shadowAccount {
 		return _('shadowAccount');
 		}
 
-	function is_base_module() {
+	function is_base_module($scope) {
 		return false;
 	}