diff --git a/cd_utils/cdutils_k_types.cpp b/cd_utils/cdutils_k_types.cpp
index 671f182..5156bc4 100644
--- a/cd_utils/cdutils_k_types.cpp
+++ b/cd_utils/cdutils_k_types.cpp
@@ -103,6 +103,7 @@ void KSection::read(const void * ep) {
 
 void KSection::update(KSection & v, bool keep_names) {
 	PIMap<PIString, PIString> vk_ids;
+	PISet<int> used;
 	PIMap<int, KType>::iterator i;
 	for (i = v.k.begin(); i != v.k.end(); ++i)
 		vk_ids[i.value().name()] = i.value().formula();
@@ -113,13 +114,25 @@ void KSection::update(KSection & v, bool keep_names) {
 				continue;
 			}
 		}
-		if (v.k.contains(i.key()))
+		if (v.k.contains(i.key())) {
 			k[i.key()].formula_ = v.k[i.key()].formula_;
+			used << i.key();
+		}
 	}
+	for (i = v.k.begin(); i != v.k.end(); ++i) {
+		if (!used.contains(i.key()))
+			k[i.key()] = i.value();
+	}
+	used.clear();
 	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);
+		used << j.key();
+	}
+	for (j = v.s.begin(); j != v.s.end(); ++j) {
+		if (!used.contains(j.key()))
+			s[j.key()] = j.value();
 	}
 }