diff --git a/Source/Swig/swig.h b/Source/Swig/swig.h
index 29bba5e4a..6e97d536c 100644
--- a/Source/Swig/swig.h
+++ b/Source/Swig/swig.h
@@ -84,6 +84,8 @@ typedef  DOH     SwigType;
 /* --- File interface --- */
 
 extern void     Swig_add_directory(const String_or_char *dirname);
+extern void     Swig_push_directory(const String_or_char *dirname);
+extern void     Swig_pop_directory();
 extern String  *Swig_last_file();
 extern List    *Swig_search_path();
 extern FILE    *Swig_open(const String_or_char *name);