diff --git a/docs/Tools/Treadle.rst b/docs/Tools/Treadle.rst
index 19df75de..4c6d016c 100644
--- a/docs/Tools/Treadle.rst
+++ b/docs/Tools/Treadle.rst
@@ -1,5 +1,9 @@
-Treadle
+Treadle and FIRRTL Interpreter
 ==============================
 
-`Treadle <https://github.com/freechipsproject/treadle>`__ is a circuit simulator that directly executes FIRRTL.
-It is especially useful for interactive debugging and small unit tests that benefit from a low-overhead simulator.
+`Treadle <https://github.com/freechipsproject/treadle>`__ and
+`FIRRTL Interpreter <https://github.com/freechipsproject/firrtl-interpreter>`__
+are circuit simulators that directly execute FIRRTL (specifically low-firrtl IR).
+Treadle is the replacement for FIRRTL Interpreter but FIRRTL Interpreter is still used within some
+projects. Treadle is useful for simulating modules in a larger SoC design. Many projects
+use Treadle for interactive debugging and a low-overhead simulator.