diff --git a/docs/libssh2_userauth_publickey_fromfile_ex.3 b/docs/libssh2_userauth_publickey_fromfile_ex.3
index 51091d7c..fbd75ebd 100644
--- a/docs/libssh2_userauth_publickey_fromfile_ex.3
+++ b/docs/libssh2_userauth_publickey_fromfile_ex.3
@@ -8,7 +8,7 @@ libssh2_userauth_publickey_fromfile_ex - authenticate a session with a public ke
 int
 libssh2_userauth_publickey_fromfile_ex(LIBSSH2_SESSION *session,
                                        const char *username,
-                                       unsigned int ousername_len,
+                                       unsigned int username_len,
                                        const char *publickey,
                                        const char *privatekey,
                                        const char *passphrase);