From 9f62e53461464e23ccc4f8cbb0b42136f0bfb97f Mon Sep 17 00:00:00 2001
From: Vern Paxson <vern@corelight.com>
Date: Tue, 30 Sep 2025 10:44:13 -0700
Subject: [PATCH] fix to enable -O gen-standalone-C++ code to extend enum types

---
 src/Type.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Type.cc b/src/Type.cc
index 397a27ebe8..fd1069170d 100644
--- a/src/Type.cc
+++ b/src/Type.cc
@@ -1700,8 +1700,11 @@ void EnumType::AddNameInternal(const string& full_name, zeek_int_t val) {
     names[full_name] = val;
     rev_names[val] = full_name;
 
-    if ( ! vals.contains(val) )
+    if ( ! vals.contains(val) ) {
+        if ( counter >= 0 && val == vals.size() )
+            ++counter;
         vals[val] = make_intrusive<EnumVal>(IntrusivePtr{NewRef{}, this}, val);
+    }
 }
 
 zeek_int_t EnumType::Lookup(const string& module_name, const char* name) const {