diff --git a/drivers/mtd/spi-nor/core.c b/drivers/mtd/spi-nor/core.c
index 502967c76c5f..e758ebfe1a9f 100644
--- a/drivers/mtd/spi-nor/core.c
+++ b/drivers/mtd/spi-nor/core.c
@@ -177,7 +177,7 @@ int spi_nor_controller_ops_write_reg(struct spi_nor *nor, u8 opcode,
 
 static int spi_nor_controller_ops_erase(struct spi_nor *nor, loff_t offs)
 {
-	if (spi_nor_protocol_is_dtr(nor->write_proto))
+	if (spi_nor_protocol_is_dtr(nor->reg_proto))
 		return -EOPNOTSUPP;
 
 	return nor->controller_ops->erase(nor, offs);
@@ -972,7 +972,7 @@ static int spi_nor_erase_chip(struct spi_nor *nor)
 	if (nor->spimem) {
 		struct spi_mem_op op = SPI_NOR_CHIP_ERASE_OP;
 
-		spi_nor_spimem_setup_op(nor, &op, nor->write_proto);
+		spi_nor_spimem_setup_op(nor, &op, nor->reg_proto);
 
 		ret = spi_mem_exec_op(nor->spimem, &op);
 	} else {
@@ -1115,7 +1115,7 @@ int spi_nor_erase_sector(struct spi_nor *nor, u32 addr)
 			SPI_NOR_SECTOR_ERASE_OP(nor->erase_opcode,
 						nor->addr_width, addr);
 
-		spi_nor_spimem_setup_op(nor, &op, nor->write_proto);
+		spi_nor_spimem_setup_op(nor, &op, nor->reg_proto);
 
 		return spi_mem_exec_op(nor->spimem, &op);
 	} else if (nor->controller_ops->erase) {