diff --git a/src/nm-cloud-setup/nmcs-provider.c b/src/nm-cloud-setup/nmcs-provider.c
index a519ef9b5e..fd9a61b813 100644
--- a/src/nm-cloud-setup/nmcs-provider.c
+++ b/src/nm-cloud-setup/nmcs-provider.c
@@ -192,6 +192,17 @@ nmcs_provider_get_config_iface_data_create(NMCSProviderGetConfigTaskData *get_co
         .was_requested   = was_requested,
     };
 
+    /* "priv" is a union, and according to C, it might not be properly initialized
+     * that all union members are set to false/0/NULL/0.0. We need to know which
+     * union field we are going to use, and that depends on the type of "self".
+     * Also, knowing the type would allow us to initialize to something other than
+     * false/0/NULL/0.0. */
+    if (G_OBJECT_TYPE(get_config_data->self) == nmcs_provider_aliyun_get_type()) {
+        iface_data->priv.aliyun = (typeof(iface_data->priv.aliyun)){
+            .has_primary_ip_address = FALSE,
+        };
+    }
+
     /* the has does not own the key (iface_datta->hwaddr), the lifetime of the
      * key is associated with the iface_data instance. */
     g_hash_table_replace(get_config_data->result_dict, (char *) iface_data->hwaddr, iface_data);
diff --git a/src/nm-cloud-setup/nmcs-provider.h b/src/nm-cloud-setup/nmcs-provider.h
index d1ab0a33c2..502f1d0323 100644
--- a/src/nm-cloud-setup/nmcs-provider.h
+++ b/src/nm-cloud-setup/nmcs-provider.h
@@ -45,7 +45,7 @@ typedef struct {
      * the implementations. However, it's convenient to track implementation specific data
      * here, thus we violate such separation. In practice, all subclasses are known
      * at compile time, and it will be simpler this way. */
-    struct {
+    union {
         struct {
             in_addr_t primary_ip_address;
             bool      has_primary_ip_address : 1;
@@ -191,4 +191,11 @@ void nmcs_provider_get_config(NMCSProvider       *provider,
 NMCSProviderGetConfigResult *
 nmcs_provider_get_config_finish(NMCSProvider *provider, GAsyncResult *result, GError **error);
 
+/*****************************************************************************/
+
+/* Forward declare the implemented gtype getters so we can use it at a few places without requiring
+ * to include the full header. The other parts of those headers should not be used aside where they
+ * are necessary. */
+GType nmcs_provider_aliyun_get_type(void);
+
 #endif /* __NMCS_PROVIDER_H__ */