diff --git a/docs/configuration.md b/docs/configuration.md
index ac5c4684..14db728a 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -59,7 +59,9 @@ All options below still possible in cmdline, but better write it in config file:
 
 * --i2pcontrol.address= - The address to listen on (I2P control service)
 * --i2pcontrol.port=    - Port of I2P control service. Usually 7650. I2PControl is off if not specified
-* --i2pcontrol.enabled= - If I2P control is enabled. false by default 
+* --i2pcontrol.enabled= - If I2P control is enabled. false by default   
+
+* --precomputation.elgamal=  - Use ElGamal precomputated tables. false for x64 and true for other platforms by default    
 
 Config files
 ------------