diff --git a/flashchips.c b/flashchips.c
index 962b7cb..266f6b0 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -10036,6 +10036,55 @@
 		.voltage	= {2700, 3600},
 	},
 
+	{
+		.vendor		= "Macronix",
+		.name		= "MX66L1G45G",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= MACRONIX_ID,
+		.model_id	= MACRONIX_MX66L1G45G,
+		.total_size	= 131072,
+		.page_size	= 256,
+		/* OTP: 512B total; enter 0xB1, exit 0xC1 */
+		.feature_bits	= FEATURE_WRSR_WREN | FEATURE_OTP | FEATURE_4BA,
+		.tested		= TEST_OK_PREW,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 32768} },
+				.block_erase = spi_block_erase_21,
+			}, {
+				.eraseblocks = { {4 * 1024, 32768} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 4096} },
+				.block_erase = spi_block_erase_5c,
+			}, {
+				.eraseblocks = { {32 * 1024, 4096} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 2048} },
+				.block_erase = spi_block_erase_dc,
+			}, {
+				.eraseblocks = { {64 * 1024, 2048} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {128 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {128 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		/* TODO: security register and SBLK/SBULK, configuration register */
+		.printlock	= spi_prettyprint_status_register_bp3_srwd, /* bit6 is quad enable */
+		.unlock		= spi_disable_blockprotect_bp3_srwd,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read, /* Fast read (0x0B) supported */
+		.voltage	= {2700, 3600},
+	},
+
 	/* The ST M25P05 is a bit of a problem. It has the same ID as the
 	 * ST M25P05-A in RES mode, but supports only 128 byte writes instead
 	 * of 256 byte writes. We rely heavily on the fact that probe_spi_res1
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 */