diff --git a/docs/randomsources.rst b/docs/randomsources.rst
index c38b9f12dfeb5884feb3e181d4ef0865225b97d9..6845f1e673017d29c6c6f45a2e4860df7273faea 100644
--- a/docs/randomsources.rst
+++ b/docs/randomsources.rst
@@ -33,6 +33,12 @@ therefore depends on the quality of your OS implementation.
 As a user you can enforce the use of this source of randomness with
 the ``-r system`` option.
 
+Please note that the Raspberry Pi is said to provide a hardware random
+number generator that delivers "real randomness". One has to enable it
+system-wide to make it the active source of randomness on a Raspberry
+Pi. If done properly, also :class:`randomSystemRandom` (and hence
+`diceware`) should use good quality random numbers.
+
 
 Real Dice
 ---------