diff --git a/repositories.txt b/repositories.txt
index 0dd9a69a..7d3c2984 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -1850,6 +1850,7 @@ https://github.com/dejwk/roo_display
 https://github.com/dejwk/roo_flags
 https://github.com/dejwk/roo_icons
 https://github.com/dejwk/roo_io
+https://github.com/dejwk/roo_io_arduino
 https://github.com/dejwk/roo_logging
 https://github.com/dejwk/roo_material_icons
 https://github.com/dejwk/roo_onewire