diff --git a/repositories.txt b/repositories.txt
index b1191413..60b20373 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -1662,6 +1662,7 @@ https://github.com/RobTillaart/MultiMap
 https://github.com/RobTillaart/Multiplex
 https://github.com/RobTillaart/Optoma
 https://github.com/RobTillaart/PAR27979
+https://github.com/RobTillaart/PCA9551
 https://github.com/RobTillaart/PCA9553
 https://github.com/RobTillaart/PCA9634
 https://github.com/RobTillaart/PCA9635