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-rw-r--r--include/osmocom/gsm/a5.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/osmocom/gsm/a5.h b/include/osmocom/gsm/a5.h
index c0767346..d22cdbbb 100644
--- a/include/osmocom/gsm/a5.h
+++ b/include/osmocom/gsm/a5.h
@@ -48,7 +48,7 @@ osmo_a5_fn_count(uint32_t fn)
}
/* Notes:
- * - key must be 8 bytes long (or NULL for A5/0)
+ * - key must be 8 or 16 (for a5/4) bytes long (or NULL for A5/0)
* - the dl and ul pointer must be either NULL or 114 bits long
* - fn is the _real_ GSM frame number.
* (converted internally to fn_count)