diff --git a/libc/kernel/uapi/linux/spi/spidev.h b/libc/kernel/uapi/linux/spi/spidev.h
index 2fe8264..343285b 100644
--- a/libc/kernel/uapi/linux/spi/spidev.h
+++ b/libc/kernel/uapi/linux/spi/spidev.h
@@ -47,7 +47,8 @@
   __u8 cs_change;
   __u8 tx_nbits;
   __u8 rx_nbits;
-  __u16 pad;
+  __u8 word_delay_usecs;
+  __u8 pad;
 };
 #define SPI_MSGSIZE(N) ((((N) * (sizeof(struct spi_ioc_transfer))) < (1 << _IOC_SIZEBITS)) ? ((N) * (sizeof(struct spi_ioc_transfer))) : 0)
 #define SPI_IOC_MESSAGE(N) _IOW(SPI_IOC_MAGIC, 0, char[SPI_MSGSIZE(N)])