diff --git a/lib/config-win32.h b/lib/config-win32.h
index e358741a17..f8f7b1ba34 100644
--- a/lib/config-win32.h
+++ b/lib/config-win32.h
@@ -564,6 +564,10 @@ Vista
 #  endif
 #endif
 
+#ifdef USE_WIN32_LARGE_FILES
+#define HAVE__FSEEKI64
+#endif
+
 /* Define to the size of `off_t', as computed by sizeof. */
 #if defined(__MINGW32__) && \
   defined(_FILE_OFFSET_BITS) && (_FILE_OFFSET_BITS == 64)