diff --git a/src/timezone/pgtz.h b/src/timezone/pgtz.h
index d30ac7aac3..6be10367c4 100644
--- a/src/timezone/pgtz.h
+++ b/src/timezone/pgtz.h
@@ -1,5 +1,9 @@
 #include "postgres.h"
 
+#ifndef HAVE_SYMLINK
+#define HAVE_SYMLINK 0
+#endif
+
 #define NOID
 #define TZDIR pgwin32_TZDIR()