diff --git a/src/dns-manager/nm-dns-manager.c b/src/dns-manager/nm-dns-manager.c
index 8f325c91a9..33572b4065 100644
--- a/src/dns-manager/nm-dns-manager.c
+++ b/src/dns-manager/nm-dns-manager.c
@@ -792,10 +792,10 @@ build_plugin_config_lists (NMDnsManager *self,
 		*out_dev_configs = g_slist_append (*out_dev_configs, priv->ip6_device_config);
 
 	for (iter = priv->configs; iter; iter = g_slist_next (iter)) {
-		if (   (iter->data != priv->ip4_vpn_config)
-		    && (iter->data != priv->ip4_device_config)
-		    && (iter->data != priv->ip6_vpn_config)
-		    && (iter->data != priv->ip6_device_config))
+		if (!NM_IN_SET (iter->data, priv->ip4_vpn_config,
+		                            priv->ip4_device_config,
+		                            priv->ip6_vpn_config,
+		                            priv->ip6_device_config))
 			*out_other_configs = g_slist_append (*out_other_configs, iter->data);
 	}
 }
@@ -891,10 +891,10 @@ update_dns (NMDnsManager *self,
 			merge_one_ip6_config (&rc, priv->ip6_device_config);
 
 		for (iter = priv->configs; iter; iter = g_slist_next (iter)) {
-			if (   (iter->data == priv->ip4_vpn_config)
-			    || (iter->data == priv->ip4_device_config)
-			    || (iter->data == priv->ip6_vpn_config)
-			    || (iter->data == priv->ip6_device_config))
+			if (NM_IN_SET (iter->data, priv->ip4_vpn_config,
+			                           priv->ip4_device_config,
+			                           priv->ip6_vpn_config,
+			                           priv->ip6_device_config))
 				continue;
 
 			if (NM_IS_IP4_CONFIG (iter->data)) {