diff --git a/lam/lib/modules/ddns.inc b/lam/lib/modules/ddns.inc
index 767500c8..91f02f79 100644
--- a/lam/lib/modules/ddns.inc
+++ b/lam/lib/modules/ddns.inc
@@ -54,6 +54,8 @@ class ddns extends baseModule {
 		$return["RDN"] = array("cn" => "high");
 		// LDAP filter
 		$return["ldap_filter"] = array();
+		// module dependencies
+		$return['dependencies'] = array('depends' => array('dhcp_settings'), 'conflicts' => array());
 		// managed object classes
 		$return['objectClasses'] = array();
 		// managed attributes
diff --git a/lam/lib/modules/fixed_ip.inc b/lam/lib/modules/fixed_ip.inc
index 5b3d4c12..f886717f 100644
--- a/lam/lib/modules/fixed_ip.inc
+++ b/lam/lib/modules/fixed_ip.inc
@@ -65,6 +65,8 @@ class fixed_ip extends baseModule {
 		$return["RDN"] = array("cn" => "high");
 		// LDAP filter
 		$return["ldap_filter"] = array();
+		// module dependencies
+		$return['dependencies'] = array('depends' => array('dhcp_settings'), 'conflicts' => array());
 		// managed object classes
 		$return['objectClasses'] = array();
 		// managed attributes
diff --git a/lam/lib/modules/range.inc b/lam/lib/modules/range.inc
index 9173eea5..458c2b3f 100644
--- a/lam/lib/modules/range.inc
+++ b/lam/lib/modules/range.inc
@@ -67,7 +67,7 @@ class range extends baseModule {
 		// LDAP filter
 		$return["ldap_filter"] = array('or'=>"(objectClass=dhcpSubnet)");
 		// module dependencies
-		$return['dependencies'] = array('depends' => array(), 'conflicts' => array());
+		$return['dependencies'] = array('depends' => array('dhcp_settings'), 'conflicts' => array());
 		// managed object classes
 		$return['objectClasses'] = array();
 		// managed attributes