Fix test for uintptr_t. Fixes #1568842.
diff --git a/pyconfig.h.in b/pyconfig.h.in
index a3d7f6e..8448439 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -677,7 +677,7 @@
 /* Define this if you have tcl and TCL_UTF_MAX==6 */
 #undef HAVE_UCS4_TCL
 
-/* Define this if you have the type uintptr_t. */
+/* Define to 1 if the system has the type `uintptr_t'. */
 #undef HAVE_UINTPTR_T
 
 /* Define to 1 if you have the `uname' function. */