diff --git a/glibconfig.h.win32.in b/glibconfig.h.win32.in
index 6967b1471..fbac9d2bd 100644
--- a/glibconfig.h.win32.in
+++ b/glibconfig.h.win32.in
@@ -122,6 +122,10 @@ typedef gint64 goffset;
 typedef signed int gintptr;
 typedef unsigned int guintptr;
 
+#define G_GINTPTR_MODIFIER      ""
+#define G_GINTPTR_FORMAT        "i"
+#define G_GUINTPTR_FORMAT       "u"
+
 #else
 
 #define GPOINTER_TO_INT(p)	((gint)  (gint64) (p))
@@ -138,6 +142,10 @@ typedef signed __int64 gintptr;
 typedef unsigned __int64 guintptr;
 #endif
 
+#define G_GINTPTR_MODIFIER      "I64"
+#define G_GINTPTR_FORMAT        "I64i"
+#define G_GUINTPTR_FORMAT       "I64u"
+
 #endif
 
 #ifdef NeXT /* @#%@! NeXTStep */