diff --git a/src/network/networkd-wwan-bus.c b/src/network/networkd-wwan-bus.c
index 13a860e2dc..98c6a28c26 100644
--- a/src/network/networkd-wwan-bus.c
+++ b/src/network/networkd-wwan-bus.c
@@ -882,12 +882,12 @@ static int modem_properties_changed_signal(
                 sd_bus_error *ret_error) {
 
         static const struct bus_properties_map map[] = {
-                { "Bearers",       "a{sv}", modem_map_bearers, 0,                                 },
+                { "Bearers",          "ao", modem_map_bearers, 0,                                 },
                 { "State",             "i", NULL,              offsetof(Modem, state)             },
                 { "StateFailedReason", "u", NULL,              offsetof(Modem, state_fail_reason) },
                 { "Manufacturer",      "s", NULL,              offsetof(Modem, manufacturer)      },
                 { "Model",             "s", NULL,              offsetof(Modem, model)             },
-                { "Ports",         "a{su}", modem_map_ports,   0,                                 },
+                { "Ports",         "a(su)", modem_map_ports,   0,                                 },
                 {}
         };
         Modem *modem = ASSERT_PTR(userdata);
@@ -969,7 +969,7 @@ static int modem_add(Manager *m, const char *path, sd_bus_message *message, sd_b
                 { "StateFailedReason", "u",     NULL,              offsetof(Modem, state_fail_reason) },
                 { "Manufacturer",      "s",     NULL,              offsetof(Modem, manufacturer)      },
                 { "Model",             "s",     NULL,              offsetof(Modem, model)             },
-                { "Ports",             "a{su}", modem_map_ports,   0,                                 },
+                { "Ports",             "a(su)", modem_map_ports,   0,                                 },
                 {}
         };
         Modem *modem;