diff --git a/Lib/swig.swg b/Lib/swig.swg
index 2d21bbb5b..ea73a71a4 100644
--- a/Lib/swig.swg
+++ b/Lib/swig.swg
@@ -566,6 +566,9 @@ namespace std {
 %define SWIG_TYPECHECK_CHAR_PTR          2130    %enddef
 
 
+%define SWIG_TYPECHECK_SWIGOBJECT        5000    %enddef
+
+
 /* -----------------------------------------------------------------------------
  *  Runtime code
  * ----------------------------------------------------------------------------- */
diff --git a/Lib/typemaps/swigobject.swg b/Lib/typemaps/swigobject.swg
index ab91731ba..e89b63026 100644
--- a/Lib/typemaps/swigobject.swg
+++ b/Lib/typemaps/swigobject.swg
@@ -18,7 +18,7 @@
   %set_output(*$1);
 }
 
-%typecheck(SWIG_TYPECHECK_POINTER) SWIG_Object "$1 = ($input != 0);";
+%typecheck(SWIG_TYPECHECK_SWIGOBJECT) SWIG_Object "$1 = ($input != 0);";
 
 %typemap(throws,noblock=1) SWIG_Object {
   %raise($1, "$type", 0);