diff --git a/firmware/2lib/include/2return_codes.h b/firmware/2lib/include/2return_codes.h
index 79b1a12..62885fb 100644
--- a/firmware/2lib/include/2return_codes.h
+++ b/firmware/2lib/include/2return_codes.h
@@ -788,6 +788,9 @@
 	/* Image not found in the archive */
 	VB2_ERROR_UI_MISSING_IMAGE = 0x100c0005,
 
+	/* Requested locale not available */
+	VB2_ERROR_UI_INVALID_LOCALE = 0x100c0006,
+
 	/**********************************************************************
 	 * Errors generated by host library (non-firmware) start here.
 	 */