diff --git a/README.rst b/README.rst
index ab5e747768168ca2f2ec403cc83e0957c744ba8f..eb213dd9f98bd460845a662ae153e0cce09a7467 100644
--- a/README.rst
+++ b/README.rst
@@ -17,7 +17,7 @@ implementations for:
 
 - numpy
 - `PyOpenCL <https://documen.tician.de/pyopencl/array.html>`__
-- `Pytato <https://documen.tician.de/pytato>`__
+- `Pytato <https://documen.tician.de/pytato>`__ (for lazy/deferred evaluation)
 - Debugging
 - Profiling
 
diff --git a/doc/index.rst b/doc/index.rst
index 4d2b4363f0f87d391607e4452c47d44d77ea2020..d28c7a19355fe5c68bc96aa9e07f71619f4a6918 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -7,7 +7,7 @@ implementations for:
 
 - :mod:`numpy`
 - :mod:`pyopencl`
-- :mod:`pytato`
+- :mod:`pytato` (for lazy/deferred evaluation)
 - Debugging
 - Profiling