diff --git a/flashchips.h b/flashchips.h
index 70fc140..b234b77 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -510,6 +510,7 @@
 #define MACRONIX_MX25L1635D	0x2415
 #define MACRONIX_MX25L1635E	0x2515	/* MX25L1635{E} */
 #define MACRONIX_MX66L51235F	0x201a	/* MX66L51235F, MX25L51245G */
+#define MACRONIX_MX66L1G45G	0x201b	/* MX66L1G45G */
 #define MACRONIX_MX25U8032E	0x2534
 #define MACRONIX_MX25U1635E	0x2535
 #define MACRONIX_MX25U3235E	0x2536	/* Same as MX25U6435F */