diff --git a/src/core/nm-l3-config-data.c b/src/core/nm-l3-config-data.c
index fbee1bf7e8..908c4d65d5 100644
--- a/src/core/nm-l3-config-data.c
+++ b/src/core/nm-l3-config-data.c
@@ -1950,6 +1950,21 @@ nm_l3_config_data_get_allow_routes_without_address(const NML3ConfigData *self, i
     }
 }
 
+void
+nm_l3_config_data_set_allow_routes_without_address(NML3ConfigData *self,
+                                                   int             addr_family,
+                                                   gboolean        value)
+{
+    const int IS_IPv4 = NM_IS_IPv4(addr_family);
+
+    nm_assert(_NM_IS_L3_CONFIG_DATA(self, FALSE));
+    if (IS_IPv4) {
+        self->allow_routes_without_address_4 = value;
+    } else {
+        self->allow_routes_without_address_6 = value;
+    }
+}
+
 NMProxyConfigMethod
 nm_l3_config_data_get_proxy_method(const NML3ConfigData *self)
 {
diff --git a/src/core/nm-l3-config-data.h b/src/core/nm-l3-config-data.h
index 5c8491a704..faf4f0bfa9 100644
--- a/src/core/nm-l3-config-data.h
+++ b/src/core/nm-l3-config-data.h
@@ -557,6 +557,10 @@ gboolean nm_l3_config_data_set_ip6_privacy(NML3ConfigData           *self,
 gboolean nm_l3_config_data_get_allow_routes_without_address(const NML3ConfigData *self,
                                                             int                   addr_family);
 
+void nm_l3_config_data_set_allow_routes_without_address(NML3ConfigData *self,
+                                                        int             addr_family,
+                                                        gboolean        value);
+
 NMProxyConfigMethod nm_l3_config_data_get_proxy_method(const NML3ConfigData *self);
 
 gboolean nm_l3_config_data_set_proxy_method(NML3ConfigData *self, NMProxyConfigMethod value);