https://github.com/ximion/appstream/pull/665

--- AppStream-1.0.3/src/as-system-info.c.orig
+++ AppStream-1.0.3/src/as-system-info.c
@@ -392,7 +392,7 @@
 	if (priv->kernel_name != NULL)
 		return;
 
-	if (uname (&utsbuf) != 0) {
+	if (uname (&utsbuf) < 0) {
 		g_warning ("Unable to read kernel information via uname: %s", g_strerror (errno));
 		return;
 	}