diff --git a/src/modules/bluetooth/backend-native.c b/src/modules/bluetooth/backend-native.c
index e6bf6fedc..6eb4e1682 100644
--- a/src/modules/bluetooth/backend-native.c
+++ b/src/modules/bluetooth/backend-native.c
@@ -331,8 +331,8 @@ static void register_profile(pa_bluetooth_backend *b, const char *profile, const
     pa_assert_se(m = dbus_message_new_method_call(BLUEZ_SERVICE, "/org/bluez", BLUEZ_PROFILE_MANAGER_INTERFACE, "RegisterProfile"));
 
     dbus_message_iter_init_append(m, &i);
-    dbus_message_iter_append_basic(&i, DBUS_TYPE_OBJECT_PATH, &profile);
-    dbus_message_iter_append_basic(&i, DBUS_TYPE_STRING, &uuid);
+    pa_assert_se(dbus_message_iter_append_basic(&i, DBUS_TYPE_OBJECT_PATH, &profile));
+    pa_assert_se(dbus_message_iter_append_basic(&i, DBUS_TYPE_STRING, &uuid));
     dbus_message_iter_open_container(&i, DBUS_TYPE_ARRAY, DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING DBUS_TYPE_STRING_AS_STRING
             DBUS_TYPE_VARIANT_AS_STRING DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &d);
     if (pa_streq (uuid, PA_BLUETOOTH_UUID_HSP_HS)) {
diff --git a/src/modules/bluetooth/bluez4-util.c b/src/modules/bluetooth/bluez4-util.c
index 542ce35e9..06108f4b0 100644
--- a/src/modules/bluetooth/bluez4-util.c
+++ b/src/modules/bluetooth/bluez4-util.c
@@ -792,7 +792,7 @@ static void register_endpoint(pa_bluez4_discovery *y, const char *path, const ch
 
     dbus_message_iter_init_append(m, &i);
 
-    dbus_message_iter_append_basic(&i, DBUS_TYPE_OBJECT_PATH, &endpoint);
+    pa_assert_se(dbus_message_iter_append_basic(&i, DBUS_TYPE_OBJECT_PATH, &endpoint));
 
     dbus_message_iter_open_container(&i, DBUS_TYPE_ARRAY, DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING
                                     DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING DBUS_DICT_ENTRY_END_CHAR_AS_STRING,
@@ -1175,7 +1175,7 @@ static void set_property(pa_bluez4_discovery *y, const char *bus, const char *pa
 
     pa_assert_se(m = dbus_message_new_method_call(bus, path, interface, "SetProperty"));
     dbus_message_iter_init_append(m, &i);
-    dbus_message_iter_append_basic(&i, DBUS_TYPE_STRING, &prop_name);
+    pa_assert_se(dbus_message_iter_append_basic(&i, DBUS_TYPE_STRING, &prop_name));
     pa_dbus_append_basic_variant(&i, prop_type, prop_value);
 
     dbus_message_set_no_reply(m, true);
diff --git a/src/modules/bluetooth/bluez5-util.c b/src/modules/bluetooth/bluez5-util.c
index 8e50e0be7..23100fca0 100644
--- a/src/modules/bluetooth/bluez5-util.c
+++ b/src/modules/bluetooth/bluez5-util.c
@@ -886,7 +886,7 @@ static void register_endpoint(pa_bluetooth_discovery *y, const char *path, const
     pa_assert_se(m = dbus_message_new_method_call(BLUEZ_SERVICE, path, BLUEZ_MEDIA_INTERFACE, "RegisterEndpoint"));
 
     dbus_message_iter_init_append(m, &i);
-    dbus_message_iter_append_basic(&i, DBUS_TYPE_OBJECT_PATH, &endpoint);
+    pa_assert_se(dbus_message_iter_append_basic(&i, DBUS_TYPE_OBJECT_PATH, &endpoint));
     dbus_message_iter_open_container(&i, DBUS_TYPE_ARRAY, DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING DBUS_TYPE_STRING_AS_STRING
                                          DBUS_TYPE_VARIANT_AS_STRING DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &d);
     pa_dbus_append_basic_variant_dict_entry(&d, "UUID", DBUS_TYPE_STRING, &uuid);