diff --git a/cd_utils/cdutils_k_types.cpp b/cd_utils/cdutils_k_types.cpp
index 6db7c65..0f321fe 100644
--- a/cd_utils/cdutils_k_types.cpp
+++ b/cd_utils/cdutils_k_types.cpp
@@ -79,7 +79,28 @@ void KSection::read(const void * ep) {
 
 
 void KSection::update(KSection & v, bool keep_names) {
-
+	PIMap<PIString, PIString> vk_ids;
+	PIMap<int, KType>::iterator i;
+	for (i = v.k.begin(); i != v.k.end(); ++i)
+		vk_ids[i.value().name()] = i.value().formula();
+	for (i = k.begin(); i != k.end(); ++i) {
+		bool f = false;
+		if (keep_names) {
+			if (vk_ids.contains(i.value().name())) {
+				k[i.key()].formula_ = vk_ids[i.value().name()];
+				f = true;
+			}
+		}
+		if (!f) {
+			if (v.k.contains(i.key()))
+				k[i.key()].formula_ = v.k[i.key()].formula_;
+		}
+	}
+	PIMap<int, KSection>::iterator j;
+	for (j = s.begin(); j != s.end(); ++j) {
+		if (v.s.contains(j.key()))
+			j.value().update(v.s[j.key()], keep_names);
+	}
 }