diff --git a/flashchips.h b/flashchips.h
index 47e1436..70fc140 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -968,7 +968,7 @@
 #define WINBOND_NEX_W25Q128_V_M	0x7018	/* W25Q128JVSM */
 #define WINBOND_NEX_W25Q256JV_M	0x7019	/* W25Q256JV_M (QE=0) */
 #define WINBOND_NEX_W25Q32JW_M	0x8016  /* W25Q32JW...M */
-#define WINBOND_NEX_W25Q64JW	0x8017
+#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 */