diff --git a/docs/devs/i2pd-specifics.md b/docs/devs/i2pd-specifics.md
index 7487035..1d2fcb0 100644
--- a/docs/devs/i2pd-specifics.md
+++ b/docs/devs/i2pd-specifics.md
@@ -7,5 +7,5 @@ SESSION CREATE and DEST GENERATE support additional parameter CRYPTO_TYPE specif
 
 # I2PControl
 i2p.router.status is 1 if shared local destination is ready, and 0 if not  
-
+i2p.router.net.tunnels.successrate returns tunnel creation success rate in percents  
 # BOB