diff --git a/src/include/port/win32.h b/src/include/port/win32.h
index 8863bb300cd5b78abe1fbcc51ee646ce760cfd3f..34f40041298e4378d9d9d9a0ec2f5bceaf2a497c 100644
--- a/src/include/port/win32.h
+++ b/src/include/port/win32.h
@@ -88,19 +88,6 @@
 #define PGDLLEXPORT
 #endif
 
-/*
- * MinGW compilers accept both "%I64d" and "%lld" for 64 bit ints,
- * but whine about the latter, so force the former, regardless of what
- * configure found.
- */
-#if __GNUC__
-#ifdef INT64_FORMAT
-#undef INT64_FORMAT
-#undef UINT64_FORMAT
-#endif
-#define INT64_FORMAT "%I64d"
-#define UINT64_FORMAT "%I64u"
-#endif
 
 /*
  *	IPC defines