diff --git a/tests/client/torture_auth.c b/tests/client/torture_auth.c
index 96fceb77..673ba467 100644
--- a/tests/client/torture_auth.c
+++ b/tests/client/torture_auth.c
@@ -112,7 +112,7 @@ static int agent_setup(void **state)
     assert_non_null(pwd);
 
     snprintf(ssh_agent_sock,
-             sizeof(ssh_agent_cmd),
+             sizeof(ssh_agent_sock),
              "%s/agent.sock",
              s->socket_dir);