diff --git a/src/bacnet/bacenum.h b/src/bacnet/bacenum.h
index 8291b690..3ad07a6d 100644
--- a/src/bacnet/bacenum.h
+++ b/src/bacnet/bacenum.h
@@ -552,7 +552,7 @@ typedef enum {
     /* enumerations 4194304-4194327 are defined in Addendum 2020cc */
     PROP_MAX_BVLC_LENGTH_ACCEPTED = 4194304,
     PROP_MAX_NPDU_LENGTH_ACCEPTED = 4194305,
-    PROP_OPERATIONAL_CERTIFICATE_FILE = 4194305,
+    PROP_OPERATIONAL_CERTIFICATE_FILE = 4194306,
     PROP_CURRENT_HEALTH = 4194307,
     PROP_SC_CONNECT_WAIT_TIMEOUT = 4194308,
     PROP_SC_DIRECT_CONNECT_ACCEPT_ENABLE = 4194309,