diff --git a/mpt/README b/mpt/README
index c68822f08..8aa8c5cb6 100644
--- a/mpt/README
+++ b/mpt/README
@@ -11,6 +11,8 @@ of development.
 The current maintainer of this driver is Erik. Please send him all
 question related to it (CC: scst-devel@lists.sourceforge.net).
 
+This driver tested only on Linux kernel versions 2.6.15.x.
+
 Building from the Linux kernel tree
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