diff --git a/master/ioctl.h b/master/ioctl.h
index 53ce5719..2c851f1a 100644
--- a/master/ioctl.h
+++ b/master/ioctl.h
@@ -56,7 +56,7 @@
  *
  * Increment this when changing the ioctl interface!
  */
-#define EC_IOCTL_VERSION_MAGIC 5
+#define EC_IOCTL_VERSION_MAGIC 6
 
 // Command-line tool
 #define EC_IOCTL_MODULE                EC_IOR(0x00, ec_ioctl_module_t)