diff --git a/Lib/python/std_wstring.i b/Lib/python/std_wstring.i
index 87b098f7b..ee2fa2ffe 100644
--- a/Lib/python/std_wstring.i
+++ b/Lib/python/std_wstring.i
@@ -5,6 +5,10 @@
 #ifndef SWIG_STD_BASIC_STRING
 #define SWIG_STD_WSTRING
 
+%{
+#include <cwchar>
+%}
+
 %include <pywstrings.swg>
 
 namespace std
diff --git a/Lib/std/std_wstring.i b/Lib/std/std_wstring.i
index cdec5b897..dd78d0254 100644
--- a/Lib/std/std_wstring.i
+++ b/Lib/std/std_wstring.i
@@ -1,7 +1,12 @@
+%{
+#include <cwchar>
+%}
+
 %include <std/std_basic_string.i>
 
 /* wide strings */
 
+
 namespace std
 {
   %std_comp_methods(basic_string<wchar_t>);