diff --git a/lib/blkid/probe.c b/lib/blkid/probe.c
index 917447b6..00cf8507 100644
--- a/lib/blkid/probe.c
+++ b/lib/blkid/probe.c
@@ -905,7 +905,7 @@ static int probe_udf(struct blkid_probe *probe,
 		   NSR02 for UDF 1.50
 		   NSR03 for UDF 2.00 */
 		if (!memcmp(isosb->vd_id, "NSR0", 4))
-			return 0;
+			return probe_iso9660(probe, id, buf);
 		for (m = udf_magic; *m; m++)
 			if (!memcmp(*m, isosb->vd_id, 5))
 				break;
diff --git a/lib/blkid/tests/udf.img.bz2 b/lib/blkid/tests/udf.img.bz2
new file mode 100644
index 00000000..bd2deb0a
Binary files /dev/null and b/lib/blkid/tests/udf.img.bz2 differ
diff --git a/lib/blkid/tests/udf.results b/lib/blkid/tests/udf.results
new file mode 100644
index 00000000..1f7aa481
--- /dev/null
+++ b/lib/blkid/tests/udf.results
@@ -0,0 +1,2 @@
+TYPE='udf'
+LABEL='test-udf'