diff --git a/README.md b/README.md
index e71d19c..cdc26ea 100644
--- a/README.md
+++ b/README.md
@@ -116,3 +116,5 @@
 The most important ancestor of *gr-gsm* (and *gsm-receiver* of *Airprobe* project) was *gsm-tvoid*. 
 
 *Gr-gsm* wouldn't be also possible without help and inspiration by Harald Welte, Dieter Spaar and Sylvain Munaut.
+
+Special thanks to Pawel Koszut who lent his precious USRP1 to the author of *gr-gsm* (Piotr Krysik) in 2007-2010.