diff --git a/flashchips.h b/flashchips.h
index eda5b6e..9b89355 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -973,6 +973,7 @@
 #define WINBOND_NEX_W25Q64JW_M	0x8017  /* W25Q64JW...M */
 #define WINBOND_NEX_W25Q128_DTR	0x8018	/* W25Q128JW_DTR */
 #define WINBOND_NEX_W25Q256_DTR	0x8019	/* W25Q256JW_DTR aka W25Q256256JW-IM */
+#define WINBOND_NEX_W25Q512NW_IM	0x8020 /* W25Q512NW-IM */
 
 #define WINBOND_ID		0xDA	/* Winbond */
 #define WINBOND_W19B160BB	0x49