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-rw-r--r--docs/replay.txt1
1 files changed, 1 insertions, 0 deletions
diff --git a/docs/replay.txt b/docs/replay.txt
index ce97c3f72f..f4619a62a3 100644
--- a/docs/replay.txt
+++ b/docs/replay.txt
@@ -67,6 +67,7 @@ Modifications of qemu include:
  * network filter for recording and replaying the packets
  * block driver for making block layer deterministic
  * serial port input record and replay
+ * recording of random numbers obtained from the external sources
 
 Locking and thread synchronisation
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