diff --git a/drivers/rtc/rtc-pcf2127.c b/drivers/rtc/rtc-pcf2127.c
index d13c20a2adf715ab9c7bd087574dd7a376533e05..48ce1e85deb130d9da1804c8f83bba159a149a94 100644
--- a/drivers/rtc/rtc-pcf2127.c
+++ b/drivers/rtc/rtc-pcf2127.c
@@ -10,7 +10,7 @@
  *
  * based on the other drivers in this same directory.
  *
- * Datasheet: http://cache.nxp.com/documents/data_sheet/PCF2127.pdf
+ * Datasheet: https://www.nxp.com/docs/en/data-sheet/PCF2127.pdf
  */
 
 #include <linux/i2c.h>