diff --git a/repositories.txt b/repositories.txt
index 16e6bb91..5501af71 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -533,6 +533,7 @@ https://github.com/adafruit/Adafruit_NeoTrellisM4
 https://github.com/adafruit/Adafruit_nRF8001
 https://github.com/adafruit/Adafruit_nRFCrypto
 https://github.com/adafruit/Adafruit_OV7670
+https://github.com/adafruit/Adafruit_PCF8574
 https://github.com/adafruit/Adafruit_PCF8591
 https://github.com/adafruit/Adafruit_PCT2075
 https://github.com/adafruit/Adafruit_PixelDust