diff --git a/pgo/pgo.c b/pgo/pgo.c
index 707ba789..4b979990 100644
--- a/pgo/pgo.c
+++ b/pgo/pgo.c
@@ -104,8 +104,8 @@ spawn(struct reaper *reaper, const char *cwd, char *const argv[],
 
 pid_t
 slave_spawn(
-    int ptmx, int argc, const char *cwd, char *const *argv, const char *term_env,
-    const char *conf_shell, bool login_shell,
+    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 user_notifications_t *notifications)
 {
     return 0;