diff --git a/windows/config.h.ms b/windows/config.h.ms
index c3a3ca8b..a3b10d81 100644
--- a/windows/config.h.ms
+++ b/windows/config.h.ms
@@ -203,6 +203,6 @@
 #define HAVE_INT32_T 1
 
 /* Define if you have u_int32_t.  */
-#define HAVE_U_INT32_T 1
+#undef HAVE_U_INT32_T
 
 #endif /* CONFIG_H */