diff --git a/src/backend/port/win32/crashdump.c b/src/backend/port/win32/crashdump.c
index 45b6696ba17..70df35783f3 100644
--- a/src/backend/port/win32/crashdump.c
+++ b/src/backend/port/win32/crashdump.c
@@ -38,8 +38,6 @@
 
 #include "postgres.h"
 
-#define WIN32_LEAN_AND_MEAN
-
 /*
  * Some versions of the MS SDK contain "typedef enum { ... } ;" which the MS
  * compiler quite sanely complains about. Well done, Microsoft.