diff --git a/repositories.txt b/repositories.txt
index a423a90c..7232dc24 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -3552,6 +3552,7 @@ https://github.com/RobTillaart/FunctionGenerator
 https://github.com/RobTillaart/GAMMA
 https://github.com/RobTillaart/GST
 https://github.com/RobTillaart/GY521
+https://github.com/RobTillaart/HC4051
 https://github.com/RobTillaart/HC4067
 https://github.com/RobTillaart/HeartBeat
 https://github.com/RobTillaart/Histogram