diff --git a/libc/kernel/common/linux/mt9t013.h b/libc/kernel/common/linux/mt9t013.h
index 11dc4b3..821ef21 100644
--- a/libc/kernel/common/linux/mt9t013.h
+++ b/libc/kernel/common/linux/mt9t013.h
@@ -89,6 +89,7 @@
 struct mt9t013_exposure_gain {
  uint16_t gain;
  uint16_t line;
+ uint32_t mode;
 };
 
 #define MT9T013_I2C_IOCTL_EXPOSURE_GAIN   _IOW(MT9T013_I2C_IOCTL_MAGIC, 18, struct exposure_gain *)