diff --git a/libflashrom.h b/libflashrom.h
index 1819861..db04467 100644
--- a/libflashrom.h
+++ b/libflashrom.h
@@ -125,7 +125,8 @@
 	FLASHROM_WP_ERR_OTHER = 2,
 	FLASHROM_WP_ERR_READ_FAILED = 3,
 	FLASHROM_WP_ERR_WRITE_FAILED = 4,
-	FLASHROM_WP_ERR_VERIFY_FAILED = 5
+	FLASHROM_WP_ERR_VERIFY_FAILED = 5,
+	FLASHROM_WP_ERR_RANGE_UNSUPPORTED = 6
 };
 
 enum flashrom_wp_mode {