diff --git a/README.rst b/README.rst
index c23e482..3746d0a 100644
--- a/README.rst
+++ b/README.rst
@@ -81,7 +81,7 @@ following command to install:
 
 .. code-block:: shell
 
-    circup install tt21100
+    circup install adafruit_tt21100
 
 Or the following command to update an existing version: