diff --git a/lib/Projectrans/Phase2Translator.py b/lib/Projectrans/Phase2Translator.py
index 2b5e6f2..f557709 100644
--- a/lib/Projectrans/Phase2Translator.py
+++ b/lib/Projectrans/Phase2Translator.py
@@ -2398,7 +2398,13 @@ class Phase2Translator:
             # 共享集合可能因 sig_files 过滤而缺少 include 模块的 extern 声明；
             # 这里从本 translator 的 sig_files 合并补全（跨模块 extern 必须裸名）。
             _combined_extern: dict[str, str] = dict(self._shared_export_extern_funcs)
-            for _sha1_key, _sig_path in self.sig_files.items():
+            _sig_paths: list[tuple[str, str]] = list(self.sig_files.items())
+            _temp_vpi_dir: str = getattr(self, 'temp_dir', '') or ''
+            if _temp_vpi_dir and os.path.isdir(_temp_vpi_dir):
+                for _fn in os.listdir(_temp_vpi_dir):
+                    if _fn.endswith('.vpi'):
+                        _sig_paths.append((_fn[:-4], os.path.join(_temp_vpi_dir, _fn)))
+            for _sha1_key, _sig_path in _sig_paths:
                 try:
                     _, _sig_tree = parse_python_file(_sig_path)
                     if _sig_tree is None: