diff --git a/doc/parted.texi b/doc/parted.texi
index 936a1f6..2624fd8 100644
--- a/doc/parted.texi
+++ b/doc/parted.texi
@@ -686,6 +686,7 @@ from the start of the disk.
 
 @var{part-type} is one of: primary, extended, logical.  Extended and
 logical are only used for msdos and dvh disk labels.
+primary is not supported for sun label.
 
 @var{fs-type} must be on of these supported file systems:
 @itemize @bullet