diff --git a/flashchips.c b/flashchips.c
index 3d8042d..09ac9b4 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -8543,6 +8543,44 @@
 
 	{
 		.vendor		= "Macronix",
+		.name		= "MX25L5121E",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= MACRONIX_ID,
+		.model_id	= MACRONIX_MX25L5121E,
+		.total_size	= 64,
+		.page_size	= 32,
+		.feature_bits	= FEATURE_WRSR_WREN,
+		.tested		= TEST_OK_PREW,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 16} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {64 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			},
+		},
+		.printlock	= spi_prettyprint_status_register_bp1_srwd,
+		.unlock		= spi_disable_blockprotect,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read, /* Fast read (0x0B) supported */
+		.voltage	= {2700, 3600},
+	},
+
+	{
+		.vendor		= "Macronix",
 		.name		= "MX25L6405",
 		.bustype	= BUS_SPI,
 		.manufacture_id	= MACRONIX_ID,
diff --git a/flashchips.h b/flashchips.h
index f6e2588..4ae6c07 100644
--- a/flashchips.h
+++ b/flashchips.h
@@ -482,6 +482,7 @@
  * Generalplus SPI chips seem to be compatible with Macronix
  * and use the same set of IDs. */
 #define MACRONIX_MX25L512	0x2010	/* Same as MX25L512E, MX25V512, MX25V512C */
+#define MACRONIX_MX25L5121E	0x2210
 #define MACRONIX_MX25L1005	0x2011	/* Same as MX25L1005C, MX25L1006E */
 #define MACRONIX_MX25L2005	0x2012	/* Same as MX25L2005C, MX25L2006E */
 #define MACRONIX_MX25L4005	0x2013	/* Same as MX25L4005A, MX25L4005C, MX25L4006E */