diff --git a/system/i2c/i2c_dev.c b/system/i2c/i2c_dev.c
index 8b5cceb2e..3fb29c9dd 100644
--- a/system/i2c/i2c_dev.c
+++ b/system/i2c/i2c_dev.c
@@ -39,7 +39,7 @@
  * Name: i2ccmd_dev
  ****************************************************************************/
 
-int i2ccmd_dev(FAR struct i2ctool_s *i2ctool, int argc, char **argv)
+int i2ccmd_dev(FAR struct i2ctool_s *i2ctool, int argc, FAR char **argv)
 {
   struct i2c_msg_s msg;
   FAR char *ptr;