diff --git a/roots.c b/roots.c
index 61c7498..d8d8a0c 100644
--- a/roots.c
+++ b/roots.c
@@ -263,5 +263,5 @@
     LOGE("format_volume: fs_type \"%s\" unsupported\n", v->fs_type);
     return -1;
 #endif
-    return format_unknown_device(volume);
+    return format_unknown_device(v->device, volume, v->fs_type);
 }