diff --git a/drivers/i2c/i2c_driver.c b/drivers/i2c/i2c_driver.c
index f326469635f..6dded767ba7 100644
--- a/drivers/i2c/i2c_driver.c
+++ b/drivers/i2c/i2c_driver.c
@@ -239,7 +239,7 @@ static int i2cdrvr_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
   FAR struct i2c_transfer_s *transfer;
   int ret;
 
-  i2cinfo("cmd=%x arg=%08x\n", cmd, arg);
+  i2cinfo("cmd=%x arg=%08lx\n", cmd, arg);
 
   /* Get our private data structure */