diff --git a/README.md b/README.md
index 320be95..09a2f51 100644
--- a/README.md
+++ b/README.md
@@ -87,6 +87,13 @@ or
 | RSA-SHA512-4096      | 6      |
 | EDDSA-SHA512-ED25519 | 7      |
 
+### vain
+
+Vanity generation adress.
+
+#### Usage
+
+./vain privatekey.dat prefix <signature>
 
 
 ### keyinfo
diff --git a/vanitygen.cpp b/vanitygen.cpp
index b3dfbd3..57a810e 100644
--- a/vanitygen.cpp
+++ b/vanitygen.cpp
@@ -62,7 +62,7 @@ int main (int argc, char * argv[])
 {
 	if (argc < 2)
 	{
-		std::cout << "Usage: keygen filename generatestring <signature type>" << std::endl;
+		std::cout << "Usage: " << argv[0] << " filename generatestring <signature type>" << std::endl;
 		return 0;
 	}
 	i2p::crypto::InitCrypto (false);