diff --git a/pgo/pgo.c b/pgo/pgo.c
index fec2d26c..3073c27c 100644
--- a/pgo/pgo.c
+++ b/pgo/pgo.c
@@ -107,7 +107,8 @@ spawn(struct reaper *reaper, const char *cwd, char *const argv[],
 pid_t
 slave_spawn(
     int ptmx, int argc, const char *cwd, char *const *argv, char *const *envp,
-    const char *term_env, const char *conf_shell, bool login_shell,
+    const env_var_list_t *extra_env_vars, const char *term_env,
+    const char *conf_shell, bool login_shell,
     const user_notifications_t *notifications)
 {
     return 0;