diff --git a/registry.txt b/registry.txt
index 09959e0e..ed8dde9d 100644
--- a/registry.txt
+++ b/registry.txt
@@ -3180,3 +3180,4 @@ https://github.com/lebuni/ZACwire-Library.git|Contributed|ZACwire for TSic
 https://github.com/RobTillaart/PCA9635.git|Contributed|PCA9635
 https://github.com/Smartphone-Companions/ESP32-ANCS-Notifications.git|Contributed|ESP32 BLE ANCS Notifications
 https://github.com/wollewald/INA219_WE.git|Contributed|INA219_WE
+https://github.com/adafruit/Adafruit_PCF8591.git|Contributed|Adafruit PCF8591