diff --git a/src/dns/nm-dns-manager.c b/src/dns/nm-dns-manager.c
index 9379621c41..f490dc835c 100644
--- a/src/dns/nm-dns-manager.c
+++ b/src/dns/nm-dns-manager.c
@@ -1542,7 +1542,9 @@ rebuild_domain_lists (NMDnsManager *self)
 			           ? " (explicit)"
 			           : (ip_data->domains.has_default_route_exclusive ? " (exclusive)" : ""),
 			       (str1 = g_strjoinv (",", (char **) ip_data->domains.search)),
-			       (str2 = g_strjoinv (",", ip_data->domains.reverse)));
+			       (  ip_data->domains.reverse
+			        ? (str2 = g_strjoinv (",", ip_data->domains.reverse))
+			        : ""));
 		}
 	}
 }