diff --git a/src/libnm-core-impl/nm-setting-private.h b/src/libnm-core-impl/nm-setting-private.h
index 12f2754eb7..aaaaaf8c4e 100644
--- a/src/libnm-core-impl/nm-setting-private.h
+++ b/src/libnm-core-impl/nm-setting-private.h
@@ -959,13 +959,13 @@ _nm_properties_override(GArray *properties_override, const NMSettInfoProperty *p
             !NM_FLAGS_ANY((param_flags),                                                        \
                           ~(NM_SETTING_PARAM_FUZZY_IGNORE | NM_SETTING_PARAM_INFERRABLE)));     \
                                                                                                 \
-        _param_spec =                                                                           \
-            g_param_spec_flags("" prop_name "",                                                 \
-                               "",                                                              \
-                               "",                                                              \
-                               (gtype_flags),                                                   \
-                               (default_value),                                                 \
-                               G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS | (param_flags));     \
+        _param_spec = g_param_spec_flags("" prop_name "",                                       \
+                                         "",                                                    \
+                                         "",                                                    \
+                                         (gtype_flags),                                         \
+                                         (default_value),                                       \
+                                         G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY            \
+                                             | G_PARAM_STATIC_STRINGS | (param_flags));         \
                                                                                                 \
         (obj_properties)[(prop_id)] = _param_spec;                                              \
                                                                                                 \
diff --git a/src/libnm-core-impl/tests/test-general.c b/src/libnm-core-impl/tests/test-general.c
index e34cc8c282..2d7f9dd789 100644
--- a/src/libnm-core-impl/tests/test-general.c
+++ b/src/libnm-core-impl/tests/test-general.c
@@ -5676,9 +5676,13 @@ test_setting_wireless_security_changed_signal(void)
                                                         "wep-key0",
                                                         NM_SETTING_SECRET_FLAG_AGENT_OWNED,
                                                         NULL)));
+    ASSERT_UNCHANGED(g_assert(nm_setting_set_secret_flags(NM_SETTING(s_wsec),
+                                                          "wep-key1",
+                                                          NM_SETTING_SECRET_FLAG_AGENT_OWNED,
+                                                          NULL)));
     ASSERT_CHANGED(g_assert(nm_setting_set_secret_flags(NM_SETTING(s_wsec),
                                                         "wep-key1",
-                                                        NM_SETTING_SECRET_FLAG_AGENT_OWNED,
+                                                        NM_SETTING_SECRET_FLAG_NOT_SAVED,
                                                         NULL)));
     ASSERT_CHANGED(g_assert(nm_setting_set_secret_flags(NM_SETTING(s_wsec),
                                                         "wep-key2",
@@ -5686,7 +5690,7 @@ test_setting_wireless_security_changed_signal(void)
                                                         NULL)));
     ASSERT_CHANGED(g_assert(nm_setting_set_secret_flags(NM_SETTING(s_wsec),
                                                         "wep-key3",
-                                                        NM_SETTING_SECRET_FLAG_AGENT_OWNED,
+                                                        NM_SETTING_SECRET_FLAG_NOT_SAVED,
                                                         NULL)));
 
     g_object_unref(connection);
diff --git a/src/libnm-core-impl/tests/test-setting.c b/src/libnm-core-impl/tests/test-setting.c
index 0c800f53f1..826cf16343 100644
--- a/src/libnm-core-impl/tests/test-setting.c
+++ b/src/libnm-core-impl/tests/test-setting.c
@@ -4922,7 +4922,8 @@ check_done:;
                                      NM_VALUE_TYPE_STRING,
                                      NM_VALUE_TYPE_BYTES,
                                      NM_VALUE_TYPE_STRV,
-                                     NM_VALUE_TYPE_ENUM);
+                                     NM_VALUE_TYPE_ENUM,
+                                     NM_VALUE_TYPE_FLAGS);
 
                 if (NM_FLAGS_HAS(sip->param_spec->flags, G_PARAM_EXPLICIT_NOTIFY)) {
                     g_assert(expected);