diff --git a/system/public/magenta/syscalls.sysgen b/system/public/magenta/syscalls.sysgen
index 72196e76..417a0b30 100644
--- a/system/public/magenta/syscalls.sysgen
+++ b/system/public/magenta/syscalls.sysgen
@@ -167,8 +167,6 @@ syscall process_exit noreturn
     (retcode: int);
 
 syscall process_create
-    (job: mx_handle_t, name: char[name_len] IN, name_len: uint32_t, options: uint32_t,
-        out: mx_handle_t[1] OUT)
     (job: mx_handle_t, name: char[name_len] IN, name_len: uint32_t, options: uint32_t,
         proc_handle: mx_handle_t[1] OUT, vmar_handle: mx_handle_t[1] OUT)
     returns (mx_status_t);