diff --git a/README b/README
index f8520ac7..556ab3f4 100644
--- a/README
+++ b/README
@@ -37,6 +37,7 @@ Requirements
  - libglib >= 2.32.0
  - libzip >= 0.10
  - libserialport >= 0.1.0 (optional, used by some drivers)
+ - librevisa >= 0.0.20130812 (optional, used by some drivers)
  - libusb-1.0 >= 1.0.16 (optional, used by some drivers)
  - libftdi >= 0.16 (optional, used by some drivers)
  - check >= 0.9.4 (optional, only needed to run unit tests)