diff --git a/bindings/cxx/classes.cpp b/bindings/cxx/classes.cpp
index 5833c332..ac583d04 100644
--- a/bindings/cxx/classes.cpp
+++ b/bindings/cxx/classes.cpp
@@ -328,13 +328,13 @@ void Configurable::config_set(const ConfigKey *key, Glib::VariantBase value)
 		key->get_id(), value.gobj()));
 }
 
-Glib::VariantBase Configurable::config_list(const ConfigKey *key)
+Glib::VariantContainerBase Configurable::config_list(const ConfigKey *key)
 {
 	GVariant *data;
 	check(sr_config_list(
 		config_driver, config_sdi, config_channel_group,
 		key->get_id(), &data));
-	return Glib::VariantBase(data);
+	return Glib::VariantContainerBase(data);
 }
 
 Device::Device(struct sr_dev_inst *structure) :
diff --git a/bindings/cxx/include/libsigrok/libsigrok.hpp b/bindings/cxx/include/libsigrok/libsigrok.hpp
index 960d0d69..041f8498 100644
--- a/bindings/cxx/include/libsigrok/libsigrok.hpp
+++ b/bindings/cxx/include/libsigrok/libsigrok.hpp
@@ -258,7 +258,7 @@ public:
 	/** Set configuration for the given key to a specified value. */
 	void config_set(const ConfigKey *key, Glib::VariantBase value);
 	/** Enumerate available values for the given configuration key. */
-	Glib::VariantBase config_list(const ConfigKey *key);
+	Glib::VariantContainerBase config_list(const ConfigKey *key);
 protected:
 	Configurable(
 		struct sr_dev_driver *driver,