diff --git a/README.rst b/README.rst
index 3281a6d..6a8184f 100644
--- a/README.rst
+++ b/README.rst
@@ -322,7 +322,7 @@ UNIX systems
 
 **SunOS**:
 
-- SmartOS
+- SmartOS (2015Q4 and later)
 
 Unsupported Distributions
 -------------------------