diff --git a/flashchips.h b/flashchips.h
index 4ae6c07..5b7937f 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -948,6 +948,7 @@
 #define WINBOND_NEX_W25Q256JV_M	0x7019	/* W25Q256JV_M (QE=0) */
 #define WINBOND_NEX_W25Q64JW	0x8017
 #define WINBOND_NEX_W25Q128_DTR	0x8018	/* W25Q128JW_DTR */
+#define WINBOND_NEX_W25Q256_DTR	0x8019	/* W25Q256JW_DTR aka W25Q256256JW-IM */
 
 #define WINBOND_ID		0xDA	/* Winbond */
 #define WINBOND_W19B160BB	0x49