diff --git a/flashchips.h b/flashchips.h
index e5ef390..c58595d 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -941,6 +941,7 @@
 #define WINBOND_NEX_W25Q32_W	0x6016	/* W25Q32DW; W25Q32FV in QPI mode */
 #define WINBOND_NEX_W25Q64_W	0x6017	/* W25Q64DW; W25Q64FV in QPI mode */
 #define WINBOND_NEX_W25Q128_W	0x6018	/* W25Q128FW; W25Q128FV in QPI mode */
+#define WINBOND_NEX_W25Q256_W	0x6019	/* W25Q256JW */
 #define WINBOND_NEX_W25Q128_V_M	0x7018	/* W25Q128JVSM */
 #define WINBOND_NEX_W25Q256JV_M	0x7019	/* W25Q256JV_M (QE=0) */
 #define WINBOND_NEX_W25Q64JW	0x8017