diff --git a/logcat/event.logtags b/logcat/event.logtags
index 09640e1..6040bd9 100644
--- a/logcat/event.logtags
+++ b/logcat/event.logtags
@@ -150,5 +150,8 @@
 80305 bionic_event_resolver_wrong_server (uid|1)
 80310 bionic_event_resolver_wrong_query (uid|1)
 
+# libcore failure logging
+90100 cert_pin_failure (certs|4)
+
 # NOTE - the range 1000000-2000000 is reserved for partners and others who
 # want to define their own log tags without conflicting with the core platform.