diff --git a/registry.txt b/registry.txt
index 30bc9d34..47f41e28 100644
--- a/registry.txt
+++ b/registry.txt
@@ -3838,3 +3838,4 @@ https://github.com/aggregate/LCLV.git|Contributed|LCLV
 https://github.com/TheFidax/Rcn600.git|Contributed|Rcn600
 https://github.com/dlyckelid/KX023-1025-IMU.git|Contributed|KX0231025IMU
 https://github.com/IowaScaledEngineering/arduino-mcp3427.git|Contributed|ISE I2C-MCP3427 Library
+https://github.com/pu2clr/PCF8574.git|Contributed|PU2CLR PCF8574