diff -upr upower-0.99.2-orig/libupower-glib/up-device.c upower-0.99.2/libupower-glib/up-device.c
--- upower-0.99.2-orig/libupower-glib/up-device.c	2014-05-20 14:24:12.000000000 +0200
+++ upower-0.99.2/libupower-glib/up-device.c	2015-03-03 14:39:46.479671182 +0100
@@ -422,7 +422,7 @@ GPtrArray *
 up_device_get_history_sync (UpDevice *device, const gchar *type, guint timespec, guint resolution, GCancellable *cancellable, GError **error)
 {
 	GError *error_local = NULL;
-	GVariant *gva;
+	GVariant *gva = NULL;
 	guint i;
 	GPtrArray *array = NULL;
 	gboolean ret;
@@ -502,7 +502,7 @@ GPtrArray *
 up_device_get_statistics_sync (UpDevice *device, const gchar *type, GCancellable *cancellable, GError **error)
 {
 	GError *error_local = NULL;
-	GVariant *gva;
+	GVariant *gva = NULL;
 	guint i;
 	GPtrArray *array = NULL;
 	gboolean ret;