diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 7863a59..63f1d63 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -100,6 +100,9 @@
 /* Returns the number of read bytes */
 extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
 					 u8 command, u8 *values);
+extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client * client,
+					  u8 command, u8 length,
+					  u8 *values);
 
 /*
  * A driver is capable of handling one or more physical devices present on