diff --git a/flashchips.h b/flashchips.h
index dc04a5a..29294fb 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -931,6 +931,7 @@
 #define WINBOND_NEX_W25Q64_V	0x4017	/* W25Q64BV, W25Q64CV; W25Q64FV in SPI mode (default) */
 #define WINBOND_NEX_W25Q128_V	0x4018	/* W25Q128BV; W25Q128FV in SPI mode (default) */
 #define WINBOND_NEX_W25Q256_V	0x4019	/* W25Q256FV or W25Q256JV_Q (QE=1) */
+#define WINBOND_NEX_W25Q512JV	0x4020	/* W25Q512JV */
 #define WINBOND_NEX_W25Q20_W	0x5012	/* W25Q20BW */
 #define WINBOND_NEX_W25Q40BW	0x5013	/* W25Q40BW */
 #define WINBOND_NEX_W25Q80BW	0x5014	/* W25Q80BW */