diff --git a/docs/finn/getting_started.rst b/docs/finn/getting_started.rst
index 95594bb67a2be3a4c3fbba488c75a704f623c136..feba21ea20d6445b88f96cf8ed2ca57598e614f4 100644
--- a/docs/finn/getting_started.rst
+++ b/docs/finn/getting_started.rst
@@ -18,6 +18,7 @@ Requirements
 * A working Vivado 2019.1 installation
 * A `VIVADO_PATH` environment variable pointing to the Vivado installation directory (e.g. the directory where settings64.sh is located)
 * (optional) A PYNQ board with a network connection
+   * the ``bitstring`` package must be installed on the PYNQ: ``sudo pip install bitstring``
 
 Running FINN in Docker
 ======================